The invention discloses a feeding port of a cement clinker crusher. The feeding port comprises a shell. A feeding port body is formed in the upper side wall of the shell, the inner wall of one side ofthe feeding port body is connected with a baffle through a reset device, and the baffle is rotationally connected with the side wall of the feeding port body. An obliquely-arranged material sliding plate is arranged on the side wall of the feeding port body, and a discharging port is further formed in the lower side wall of the shell. A vibration motor is arranged in the shell, and the output endof the vibration motor is connected with a pulverizer. The shell is internally further provided with a beam arm matched with the pulverizer. The side wall of the side, away from the beam arm, of thepulverizer is rotationally connected with a connecting rod. The feeding port is high in practicability, the baffle arranged at the position of the feeding port body can effectively prevent cement clinker from being splashed out from the position of the feeding port body in the device running process; a dust suction device in the device can suck dust generated in the crusher running process, the situation that the dust overflows out of the device and pollutes the environment is prevented, vibration reduction can also be effectively conducted on the device, and potential safety hazards are reduced.