Trestle sinking type recyclable water-saving car washing device for narrow site

According to the trestle sinking type recyclable water-saving car washing device for the narrow site, the space of the trestle is fully utilized for constructing a car washing pool, material waste is reduced, the site space is saved, the car washing device is suitable for projects with narrow sites, when the trestle is broken in the later period, the car washing device breaks the trestle together, and the site secondary breaking cost is reduced. A silt settling tank in the middle of the car washing pool is connected with the three-stage sedimentation pool through a pipeline and a desilting pump, a clean water pool of the last stage of the three-stage sedimentation pool is communicated with the car washing pool through a pipeline and an adding pump, water circulation is achieved, and waste of water resources is greatly reduced. An infrared sensor is installed on the side wall of the car washing pool, a high-pressure water spraying head connected with another adding pump is further installed on the car washing