Vehicle-mounted floor drain drainage structure

The utility model discloses a vehicle-mounted floor drain drainage structure which comprises a carriage body and a drainage structure. A decontamination cavity is formed in the compartment body, and a mounting notch used for draining water is formed in the decontamination cavity. The drainage structure comprises a drainage cover, a water guide part, a hoop, a hose, a control valve and a sewage tank; the drainage cover is arranged in the mounting notch, and the water guide part is arranged outside the carriage body and connected with the drainage cover; and the tail end of the water guide part is connected with the hose through the hoop. The problems that in the prior art, a decontamination shower floor drain is too large in size in the vertical direction, a special vehicle decontamination area is narrow in space and inconvenient to install, meanwhile, the interior of the special vehicle decontamination area has a certain requirement for the positive pressure state, and installation of a traditional drainage f