Responsibility is an important factor reflecting the performance of photoelectric detector and an important basis judging whether the detector was laser-induced damaged.In this paper,compared with the short-circuit current of the standard detector,the responsibility of the detector used in the experiment was calibrated.After the PIN detector was irradiated by Nd∶YAG laser,according to the change of short-circuit current,the relationship between the responsibility of detector and the power density of incident laser was obtained.The detector irradiated by laser is fit when the power density of Nd∶YAG laser is lower than 7.6 × 105 W/cm2,the responsibility of the detector was constant for He-Ne laser.When the power density of laser is more than 9.6×105 W/cm2,with increasing incident laser power density,the responsibility of the detector was reduced slowly.And the reason for the fall of responsibility was analyzed.Our conclusion was confirmed by scanning electron microscope photographs (SEM).