Automatic control device of four-shaft transmission

The utility model discloses a four-shaft transmission automatic control device which comprises a shell, a transmission controller integrated on the shell and located at one end of the shell, and four control assemblies arranged on the shell at intervals in the first direction, and four air cylinders are arranged on the shell in the first direction. The four control assemblies and the four air cylinders are arranged in a one-to-one correspondence mode. A piston rod of the control assembly is arranged on the air cylinder, the gear shifting block is fixedly connected to the piston rod, the electromagnetic valve is arranged at the other end of the shell and electrically connected with the transmission controller, the electromagnetic valve is used for communicating the air cylinder and the air source so that the piston rod can move in the second direction, and the displacement sensor is fixedly arranged on the gear shifting block and electrically connected with the transmission controller. The first direction is p