Self-adjusting device for counterweight filler of side forklift

The utility model discloses a counterweight block self-adjusting device of a side forklift, which is mainly used for ensuring that the side forklift runs for a long distance and stabilizes a forklift body, and comprises a counterweight box, a counterweight block, a hydraulic pushing device, an angle detection device, a roller group I and a roller group II, and the counterweight block, the hydraulic pushing device, the angle detection device, the roller group I and the roller group II are positioned in the counterweight box. The hydraulic pushing device comprises a hydraulic pump, an overflow valve, an electromagnetic valve, a push rod I, a push rod II and an oil tank, the angle detection device comprises a positioning plate and an angle sensor, the angle sensor is in signal connection with the electromagnetic valve, the counterweight box is fixed to the end, away from a fork of the forklift, of the side forklift plate, and the counterweight block is of a square structure. The roller group I is fixed at the bo