The utility model provides a shading frock for photovoltaic module electrical performance test, photovoltaic module includes that the lamination piece reaches and lamination piece electric connection's terminal box, the shading frock includes support, fixed with support framework that supports photovoltaic module and the light -shielding part who carries out the shading to the non - test face of photovoltaic module to the support on. Thereby, in when test, only need be fixed in the support with the lamination piece on to make its non - test face hug closely light -shielding part can, and timemeasuring is examined to the face that trades, only need detect the upset of lamination piece and the face that trades can.