A medical waste treatment device includes a feeding hopper, a primary crushing device, a secondary crushing device, a screw conveyor, a first support, a discharge device, a storage box, a second support, a conveyor belt, a third support, a drive belt motor, a drive shaft and a sterilization device. The feeding hopper is at the top, and the lower part of the feeding hopper is provided with a primary crushing device, A secondary is arranged below the primary crushing device