The invention relates to a hydraulic suspension structure of a low platform carrier vehicle. The hydraulic suspension structure of the low platform carrier vehicle comprises a suspension frame, a suspension oil cylinder, a balance arm, an axle and a wheel component. The suspension frame is connected to the bottom of the vehicle frame of the platform carrier vehicle, the cylinder body of the suspension oil cylinder is connected with the suspension frame, the end portion of the balance arm is connected to the suspension frame, the axle is connected with the other end portion of the balance arm, the wheel component is connected with the axle, the a cylinder rod used for suspending the oil cylinder is connected with the balance arm, the distance from the connecting point of the cylinder body of the suspension oil cylinder and the suspension frame to the bottom of the vehicle frame is 70-80mm, and the distance between the connecting point of the cylinder rod of the suspension oil cylinder and the balance arm and the connecting point of the suspension frame and the balance arm is 205-215mm. The hydraulic suspension structure of the low platform carrier vehicle has the advantages that the structure is reasonable, the volume is small, the bearing capacity is large, under the condition that the bearing capacity is not changed, the height of the carrier vehicle is greatly lowered, so that the passing ability of the carrier vehicle with high goods in a driving process is guaranteed, the whole suspension structure is compact, the outline size is small, the volume is small, the weight is light, and the installation and the maintenance are convenient.