A load reducing backpack comprises two shoulder straps, a main body and at least a cushion; the main body has a cavity, a back part of the cavity is provide with a back pad, a lower part of the back pad is provided with a mounting slot, the cushion is mounted disassembly in the mounting slot and attached to a front wall of the cavity; the load reducing backpack is carried on the user's back, the shoulder straps hang on the user's shoulders; adjust the length of the shoulder straps, so that the side, near to the back pad, of the cushion against the user's waist, thereby absorbing the pressure of the articles in the load reducing backpack and reducing the pressure on the user's back and the user's shoulders.