The invention relates to the field of robot path planning and particularly relates to a multi-robot cooperative path planning method. A workpiece is provided, a main robot and a slave robot are defined, and the main information of the main robot and the slave information of the slave robot are acquired; the main robot adopts an active vision mode to acquire the information of the workpiece; according to the main information and the slave information, a robot model is built, and an environment model is built according to the workpiece information; according to the robot model and the environment model, the main robot determines the working tasks and the working paths of the main robot and the slave robot; and the main robot and the slave robot execute the working tasks according to the working paths. A three-dimensional object is intelligently identified through a binocular active vision system, which is not limited to features of the color and the shape and the like of the object. A sectional path planning technology is adopted, the path optimization efficiency is improved, a handshake collision avoidance problem in multi-robot superimposed motion can be solved, and dynamic adjustment of each joint and online optimization of the path during the multi-robot processing process can be realized.