The invention relates to a waste liquid burning remaining heat boiler that is mainly made up of waste liquid incinerator and remaining heat boiler. The heat remaining boiler adopts plane vertical header tank, plane horizontal header tank, heat exchanging pipe arrange, down cast, up cast and steam drum joint with each other to form the water circulatory system and the boiler body structure. The mending channel is leaved between the sediment coagulating pipe arranges. Ash cleaning door, ash blowing device, ash bucket, and ash cleaning window are set on the boiler body. The remaining heat boiler is simple structure and light. It sharply improve the heat exchange efficiency of the heat exchanging pipe arrange. The continuous running time is prolonged from one month to three months. And the invention could also satisfy the demand for environment protection.