Since the  reform and opening  policy, China has  now become the  largest exporting country  in  the   world.  The  rapid   growth  of  export   trade  greatly  boosts   China’s economic development.  Due to the great  difference between the energy  structure and technological level of domestic  and oversea, products  export causes a mechanism  for import state  to shift  the products  carbon footprint  associated with consumption.  The developed countries  accused China  of not  bearing the obligations  of greenhouse  gas emission reduction; on the other hand, they consumed  plenty of cheap products which are  made  in  China.  Based  on this  background  and  life  cycle  thinking,  this  thesis focuses  on  polysilicon  photovoltaic  modules  of  China and  is  trying  to  develop  a
framework for the analysis  of export products carbon footprint and  policy response in China.  Based  on  this  framework,  such  aspects  as   definition,  accounting  method, driving  force  factors  analysis,   prediction  and  policy  response  are  established   by industrial   ecology  tools   and   statistic   analysis   methods.   The  main   results   are summarized as follows:
      (1)Accounting method of Chinese products carbon footprints is established based on life  cycle assessment  (LCA) and  dynamic material flow  analysis (MFA).  We can identify the sources of  materials in processes of different  products and distinguish the carbon  footprints  of  the   materials  in  the  international  trade  with   the  accounting method .It is also helpful to analysis the carbon footprint of export products.
      (2) The  Chinese fundamental carbon  footprint database,  which is covers  the data of basic energy use,  raw materials and  industrial process, is built  with the accounting method of products  carbon footprints.  This database is  helpful to carry  out the study on  the   carbon  footprint   sources  of   materials  in   the  manufacturing   process  for providing more accurate data.
      (3)  The  method  of  analysis export   products carbon  footprint  is  established  to analyze the specific export products  of China. This method is used  in the study on the China’s  multi-crystalline silicon  photovoltaic modules  export  and the  results  shows that the  products  carbon footprint  rise with  exponential rate  and  the growth  rate of China’s  multi-crystalline  silicon photovoltaic  modules  export  volume. In  summary, exported PV modules caused significant greenhouses gas emission in China.
      (4)  Combining  the  complexity  of  export  products   carbon  footprint  with  the  characteristic   of  Logarithmic   Mean  Divisia   Index(LMDI),   we   built  a   method, included 8 parameters in economic,  technology and carbon footprint fields, to analyze the driving force factors  of carbon footprint changing. This  method is used to analyze the  driving force  factors  of  export  carbon footprint  of  PV modules  in  China.  The results show  that  the economic  parameters are  the  main parameter  to influence  the increase of export PV modules carbon footprint.
      (5) Based on  the grey prediction theory, a  model used for predicting the  trend of export  products  carbon  footprint  is  established  in  this  thesis.  Despite  the  lack  of sufficient data, it  is helpful to get the accurate results to  use this method. This method is used to estimate the future trend of carbon footprint of export  PV modules in China. The results show that the export volume  of PV modules in 2014-2020 is saturated due to  policy of  anti-dumping.  The sustainable  growth  rate of  carbon footprint  transfer would  be  controlled  due  to   the  technology  upgrading  and  energy  saving  of  PV industry and the export volume is saturated.
      (6)  The  policy  response  method   of  controlling  the  increasing  of  the  export products carbon footprint is developed  in this thesis. Suggestions such as participation in  international  negotiation,  making the  rules  of  low  carbon  footprint  of  products manufacturing  and   improving  the   technology  level   and  structure   of  export   are provided in  this policy response  method to lower  the carbon footprint.  In the case of PV modules,  we found that the  most useful  measure is to  control export volume  and expand the domestic market.
      In conclusion,  the framework  of analyzing the  export products  carbon footprint and policy  response in China  is helpful to  improve the  theory system of  research on framework  and   methodology  of  trade   carbon  footprint.  It  is   helpful  to  provide theoretical and practical support for  low carbon and sustainable international trade for China.