Seed melon crusher is a kind of seed melon skin crusher, which is characterized by: mainly including frame, motor, shell, feeding equipment, crushing equipment, selection equipment and discharging equipment. The motor and shell of the seed melon crusher are fixedly connected on the frame, the feeding equipment of the seed melon crusher is located on the upper part of the shell, the crushing equipment of the seed melon crusher is located under the feeding port of the feeding equipment for crushing the melon skin, the crushing equipment is driven by the motor, the selection equipment of the seed melon crusher is located at the bottom of the crushing equipment, and the discharge equipment of the seed melon crusher is located under the selection equipment The crushing equipment of the crusher is located in the middle of the shell, and the crushing equipment mainly includes the main shaft. The main shaft of the seed melon crusher is provided with a plurality of equidistant welded discs, each disc is provided with a plurality of evenly distributed pin holes, the pin holes between the discs are strictly corresponding, the distance between the corresponding pin holes of the adjacent two discs is penetrated with a pin shaft, and each pin shaft of the seed melon crusher is suspended with a blade group, The crushing equipment of seed melon crusher is arranged along the circumferential direction of each adjacent blade group in the main shaft direction. The blade group of seed melon crusher is composed of multiple blades and multiple retaining rings. The pin shaft of seed melon crusher connects the blades and retaining rings in series. There are pin holes at both ends of the pin shaft of seed melon crusher, and the locating pin can be inserted into the pin hole of seed melon crusher.