Vehicle-mounted dirt separation device

The invention relates to a vehicle-mounted sewage separation device which comprises a sewage separation box, the interior of the sewage separation box is divided into a treatment area with the upper portion communicated, and the treatment area comprises at least one sedimentation area and a filtering area located at the downstream of the sedimentation area; a sewage inlet pipe is connected to the sedimentation area, corresponding to the most upstream, on the sewage separation box; the filter pipe is arranged in the filter area of the dirt separation box; the water tank comprises a water inlet and a water outlet, and the water outlet is higher than the water inlet; and the suction pump set is respectively connected with the outlet of the filter pipe and the water inlet of the water tank. According to the vehicle-mounted dirt separation device, sticky excrement residues in the excrement sewage can be separated in advance before the excrement sewage is filtered by using the filter pipe, so that the service life