The utility model provides a trailer spills material recovery unit and bucket -wheel stacker reclaimer trailer, is including lieing in the top that the trailer goes out the hopper, driven cylinder (2) be connected with driving roll (1) transmission of trailer belt conveyor, through mount (3) install in later roller (5) on trailer frame (4), with conveyer belt (6) of driven cylinder (2) and roller (5) connection later, conveyer belt (6) lie in the below of trailer main belt (7), in the material input trailer play hopper of collecting. The utility model provides a technical scheme spills the belt conveyor of junk material in collection of trailer main belt below design, spills the material that falls with trailer main belt and transports in the trailer goes out the hopper, has removed the manual cleaning process from, and belt conveyor's driven cylinder is connected with trailer belt conveyor's driving roll transmission, need not to increase new power device, can simplify the structure, removes electrical equipment from, has more the security.