The invention discloses a bulk material stacking vision scanning system and an image processing method thereof. Four parts including a stacking assembly, a vision system, an industrial personal computer and a user terminal are included. The industrial personal computer automatically finishes vehicle loading stack type stacking position planning and dispatching and allocating of the work process oftwo robots in the vehicle loading process. Meanwhile, the vehicle information of a vehicle, vehicle loading orders and other information are recorded, filing is conducted, and data storage and logistics information tracing are achieved. The vision system comprises a vehicle vision detecting and positioning device and a stack type vision recognition device. The vehicle vision detecting and positioning device scans and obtains vehicle body point cloud data through a laser scanner, and through the vision processing algorithm, intelligent logistics vehicle positioning and vehicle type judging areachieved. The stack type vision recognition device conducts scanning and analysis on the material stacking situation through an industrial camera and the preset algorithm, the stacking accumulative errors are prevented, and tidy material stacking is ensured.