The main body of the 1/14 scale wood semi-trailer is made of all metal through CNC and laser processing. It has been welded and formed in the factory state, and has been surface treated, which is beautiful without losing strength. The driving system simulates the two-axle eight-wheel of a real car, and is connected to the frame through the non-powered axle and leaf spring balance suspension processed by aluminum alloy CNC to further improve the load capacity and overall strength. The sub-frame is made of high-strength engineering plastics, and has a front protection bar, which is convenient for players to spray and match the color of the tractor head.