As a kind of van, the side curtain trailer has all the characteristics of an ordinary van: the envelope is completely closed, which can prevent rain and dust, and can achieve all-weather protection for goods; The volume of the envelope is completely determined, which can effectively prevent overloading and overrun. Because the side curtain trailer is closed by the curtain on both sides, it has some outstanding advantages again: because the side curtain weight is significantly lighter than the hard side panel, thus the whole semi trailer is lighter than the van; The side curtain is flat and suitable for printing various patterns, so the appearance is significantly more beautiful than that of the van; The curtain can be pulled open quickly, and the forklift can be loaded and unloaded on the side of trailer, so the loading and unloading efficiency is very high.