CdS photocorrosion seriously impeded its application in photocatalysis, especially for water splitting. Here we report new strategies to improve CdS photocorrosion resistance properties significantly by coating Ni₂P shell and assembling an artificial gill to remove newly formed O₂ from water. Ni₂P@CdS catalyst can achieve the over-all water splitting under visible light irradiation without addition of any sacrifice reagent and noble metal loading. Compared with CdS itself, the 10Ni₂P@CdS photocatalyst exhibits excellent photocatalytic activity for hydrogen evolution (251.4 μmol of H₂ in 180 min) with a high AQE (3.89% at 430 nm). This catalyst also presents high photocurrent, low overpotential (-0.32 V vs SCE), and long fluorescence lifetime (16.27 ns) of excited charges. Cd²⁺ ions concentration measured by ICP and long term stability results verified the anti-photocorrosion role of Ni2P shell on CdS during water splitting reaction. The activity and stability of 10Ni₂P@CdS is even superior to typical 1Pt@CdS catalyst. Our results confirm CdS can be an active catalyst for photocatalytic hydrogen generation from water under visible irradiation if its stability is enhanced by protection of anti-photocorrosion over coating shell and removing the nascent formed oxygen from water.