The invention discloses a collecting hopper for cropping materials. Connecting pipe frame adapting holes, a discharging port and a feeding port are formed on a collecting hopper body; the connecting pipe frame adapting holes are formed at the top of the collecting hopper body and are located on the periphery of the feeding port; the discharging port and the feeding port are respectively formed at the bottom and top of the collecting hopper body; a channel, through which the cropping materials can pass, is arranged between the feeding port and the discharging port; the collecting hopper is characterized in that a reinforcing layer is arranged on an inner wall of the channel; and the reinforcing layer is prepared from the following raw materials: nickel plating carbon powder, zinc stearate, nanometer tungsten disulfide, lanthanum nitrate and titanium dioxide. The collecting hopper for cropping materials provided by the invention is capable of increasing the shock resistance of the product through a coating material.