The 4-ton hydraulic lifting and transferring sub parent canopy tool trailer chassis is designed with hydraulic lifting function. The vehicle is in a rising state when walking, and in a descending state when loading and unloading goods. The canopy is equipped with a 2.2-meter empty height at the top. The top and the front and back rain cloth are fixed. Transparent windows are opened at the front and back of the canopy. The top two sides are equipped with a turn over air spring assisted canopy frame, which is connected with the lower turn over transition plates at both sides of the vehicle body through ropes. When the canopy is opened, the turn over automatically opens, The material truck can be directly used for loading and unloading; The buffer type traction frame is equipped with a linkage steering mechanism. The front wheels can rotate 40 degrees. When the tractor is connected with the mother car, it is waterproof. Three electric plug connectors are provided. This trailer has a capacity of 4 tons, with a canopy, and no power. It needs to be towed by a forklift or tractor. It can prevent sun, rain, and dust. It is suitable for short distance transportation of small hardware and household appliances. The price is affordable and the load is large.