The similarities and differences between low-bed semi-trailer and flatbed semi-trailer are that the lengths of the two types of vehicles are generally 9 meters, 9.5 meters, 10 meters, 11.5 meters, 12 meters, and 13 meters, but in terms of width, low-bed semi-trailer types are 2.8 meters, 2.9 meters, and 3 meters wide, while flatbed semi-trailers are only 2.5 and 2.55 meters wide. Low-bed semi-trailers are all high-low-plate small tires, and the cargo surface is low. They are usually used to transport heavy vehicles (such as tractor trucks, buses, mining vehicles, tank-type special vehicles, etc.), mining machinery (rock drills, roller mills, crushers, sand washers, etc.), engineering machinery such as excavators, bulldozers, loaders, paving pavers, cranes, etc.) and other heavy-duty non-disassembled goods.

Flatbed semi-trailers also have high-low-plate styles, but they are mainly used for ordinary goods. The cargo surface is not as low as that of low-bed semi-trailers, and there is no ladder-type assistance at the back.

Compared with low-bed semi-trailers, flatbed semi-trailers are more suitable for medium and long-distance transportation of medium and heavy and bulk goods. They have strong applicability and have become medium and long-distance freight vehicles.