畜牧业生态系统功能评价是进行草地系统保护与管理、防治草地退化的前提，是畜牧业系统优化和持续发展的根本。为此，以西藏自治区那曲地区草地为研究对象，通过设立评价指标，建立多因子评价模式，采用三角分析法对区域内畜牧业生态系统的社会、经济、生态功能进行综合评价。为区域畜牧业未来发展提供依据。

The assessment of the functions of livestock husbandry ecosystem is not only the pre-requisite of protection, and management of ecosystems, but also the foundation for system's optimization and sustainable development. In this paper, eleven large live stock farming ecosystems in Nakchu Prefecture are studied and a "triangle" multifactor evaluation model is set up to guide the protection and management of live-stock husbandry ecosystem. In this paper, the data base of eco-livestock husbandry consists of 8 regions I_1, I_2, I_3, I_4, I_5, I_6, I_7, I_8). First the author choose every region's ecological factors including grass land efficiency (C_1), vegetation coverage (C_2), Utiliiation rate of grassland (C_3), potential of water resources (C_4) and rate of grassland degradation (C_5), economical factors including rate of live-stock husbandry output to input (C_6), commodity rate of live-stock farming production (C_7), come out rate (C_8), livestock products per person (C_9), grassland productivity (C_(10)), Social elements including rural energy (C_(11)), Culture and education (C_(12)), Labor transferring (C_(13)), birth rate (C_(14)) as assessment quotas secondly, give different weights to every quotas based on it's contribution to animal husbandry, in this paper, C_1 = 0.1533, C_2 = 0.16035, C_3 = 0.0891, C_4 = 0.1235, C_5 = 0.1744, C_6 = 0.1776, C_7 = 0.1884, C_8 = 0.1559, C_9 = 0.1489, C_(10) = 0.1460, C_(11) = 0.1745, C_(12) = 0.1583, C_(13) = 0.0737, C_(14) = 0.1738. Thirdly, analysis every region's quotas, based on superior and inferior divide into 5 scales, give 100, 80, 60, 40, 20 to 1, 2, 3, 4, 5 scale, then use formula Y_(ja) = Σ_(i=1)~s C_(ji)C_(ji)~1, Y_(jb) = Σ_(i=b)~(10)C_(ji)C_(ji)~1, Y_(jc) = Σ_(i=11)~(14)C_(ji)C_(ji)~1 to conclude out every region's different benefit. where Y_(ja) is the ecological benefit of j region (j = 1……11), Y_(jb) is economical benefit and Y_(jc) is social benefit. C_(ji) is the weights of j region's quotas and C_(ji)~1 is scales mark of j region. At last, set up a "triangle" multifactor evaluation to analyze the comprehensive function of the different eco-live stock husbandry regions in Nakchu prefecture. Based on these ways, we can draw a conclusion that the order of comprehensive function of every region is I_1 > I_4 > I_3 > I_6 > I_5 > I_2 >I_7 >I_8.