A nursing bed for defecation and self-cleaning comprises a bed frame, a bed board device, a moveable cushion, a support frame, a bedpan, an excreta container; The bedpan is hung under the movable cushion through a support frame. When the patient wants to defecate, the patient only needs to remove a cushion and make the bedpan mouth of the bedpan facing the defecation hole of the moveable cushion, then the patient can defecate on the nursing bed; and further having a cleaning device a warm water supply device, using an electric heater to heat the cleaning water to an appropriate temperature to clean the patient's buttocks, thereby reducing the infection of germs, and also cleaning the excrement that attached to the bedpan to keeps the bedpan clean.