Air guide structure and semitrailer

The utility model relates to the technical field of vehicle performance, and particularly discloses an air guide structure and a semitrailer. The air guide structure is used for guiding air penetrating through a front wall plate and comprises a limiting frame, a cooling assembly, an engine assembly and two frame plates. The cooling assembly is connected with the limiting frame, is opposite to the dash panel and is used for conveying air, facing one side of the dash panel, of the cooling assembly into the air supply pipeline; the two frame plates are located on the two sides of the air supply pipeline correspondingly and fixedly connected with the male flow guide plate through the connecting pieces. The engine assembly comprises an engine body, an engine compartment and two engine side baffles fixedly connected to the engine body, the engine side baffles are fixedly connected with female flow guide plates matched with the male flow guide plates, and when the female flow guide plates correspond to the male flow