Lightweight vehicle-mounted controller

The utility model provides a lightweight vehicle-mounted controller, which comprises a shell in which a circuit board assembly is arranged, and is characterized in that an input unit, an output unit and a control unit are integrated on the circuit board assembly, the shell is also provided with a plug interface, the shell comprises a cover body and a bottom plate, the cover body and the shell are locked through a screw, and the bottom plate is connected with the cover body. The cover body is embedded in the shell, a boss structure is formed in the middle of the bottom plate, the boss structure of the bottom plate is tightly attached to the lower portion of the circuit board assembly, and the bottom plate is made of metal aluminum. The controller is small in size, light in weight and flexible in arrangement in a vehicle, the space in the vehicle is further reserved, the passenger experience is improved, resource use is reduced, the structure is round, stress concentration is avoided, and the service life of th