Oil-containing cleaning waste liquid pretreatment system

The utility model discloses an oil-containing cleaning waste liquid pretreatment system which comprises a high-efficiency oil-water separation system, and an outlet of the high-efficiency oil-water separation system is respectively connected with a sewage filtering and fine treatment system and a desliming machine; a cyclone, a baffle plate assembly, a coalescence demulsification and oil removal assembly and an oil skimmer are sequentially arranged in the efficient oil-water separation system along the flowing direction of waste liquid; the sewage filtering and fine treatment system comprises a walnut shell filter, a second-stage filter and a second-stage filter which are connected in sequence. According to the utility model, the efficient oil-water separation system, the sewage filtering and fine treatment system and the desliming machine are integrated, so that the cleaning waste liquid can be effectively pretreated, dirty oil and solid substances in the cleaning waste liquid can be effectively removed, the