Waste liquid collecting tank of spray tower

The utility model provides a waste liquid collecting tank of a spray tower, relates to the technical field of spray treatment, and aims to solve the problems that most waste liquid collecting tanks of spray towers only have a bearing function and cannot preliminarily filter and collect waste liquid, so that the recovery treatment and reutilization stability of the waste liquid is influenced. Comprising a bearing support frame, a collecting bottom tank, a bearing top tank and a bearing support frame, a bearing supporting column is fixedly arranged at the bottom of the bearing supporting frame; the collecting bottom tank is fixedly mounted on the inner side of the bearing support frame; a butt joint sleeve is fixedly arranged at the bottom of the bearing top tank; the bearing support frame is fixedly mounted at the top of the bearing top tank, meanwhile, a closed support is fixedly mounted on the inner side of the bearing support frame, and a rotating bearing shaft is rotationally arranged at the bottom of the