Runner cutting device for automotive plastic part

The utility model discloses an automotive plastic part runner cutting device, and relates to the technical field of automotive plastic parts. The device comprises a bottom plate, the top end of the bottom plate is fixedly connected with four supporting rods, and the top ends of the four supporting rods are jointly and fixedly connected with an adjusting device. The adjusting device comprises a supporting plate, a moving groove is formed in the top end of the supporting plate, a fixing device is fixedly connected to the top end of the connecting rod, the two ends of the supporting plate are jointly and fixedly connected with a supporting frame, an air cylinder is fixedly connected to the top end of the supporting frame, and the output end of the air cylinder penetrates through the supporting frame and is fixedly connected with a cutting knife. According to the device, the adjusting device is arranged, so that runners on vehicle plastic parts with different sizes can be conveniently cut off, meanwhile, runners