The invention relates to a light bidirectional fork for a stacker, and belongs to an laminated-structure stacker fork. The invention mainly solves the technical problem that the conventional stacker fork is unreasonable in structure, heavy in self weight, large in occupied space, inconvenient to install and regulate, and difficult to machine and manufacture. In order to solve the technical problem, the invention adopts the following technical scheme: the light bidirectional fork for the stacker comprises an upper fork, a middle fork, a lower fork, a steel wire rope, a steel wire rope regulator, a middle fork roller, an upper fork guiding bolt bearing, a middle fork guide bolt bearing, a middle fork transmission rack, a lower fork transmission gear, a coupler, and a motor. The upper fork, the middle fork and the lower fork form a three-layer laminated structure, the motor is connected with a gear shaft through the coupler and drives the lower fork gear, the lower fork gear makes the middle fork move leftwards and rightwards through the middle fork transmission rack, and the leftward and rightward movement of the middle fork drives the upper fork to move leftwards and rightwards through the middle fork roller and the steel wire rope.