The oil-water separator is a newly developed separator based on traditional models, capable of recycling and reusing over 90% of waste oil. The oil content in the effluent can meet the third-level standard (100mg/L) of the Integrated Wastewater Discharge Standard (GB8978-1996) and even reach the second-level discharge standard, effectively protecting the environment while significantly reducing operational costs. This product is suitable for oil-water separation of oil-containing water containing various types of mineral oils (excluding crude oil and emulsified oil), vegetable oils, animal oils, or mixtures thereof (i.e., it can handle light oil floating on the surface), thoroughly resolving environmental pollution issues and preventing drain blockages and wastewater overflow caused by oil solidification during cold seasons. It is applicable for wastewater treatment and discharge from small and medium-sized catering establishments.