The invention discloses a hospital bed, which consists of a bed head, a bed tail, a bed frame, a guardrail, a first rolling bed surface, a first rolling bed surface roller, a bed surface middle hole, a first fixed bed surface, a second fixed bed surface, a second rolling bed surface, a defecation hole, a defecation hole bed surface, a second rolling bed surface roller; a detachable second rollingbed surface roller, a wheel chair frame, a second rolling bed surface lifting mechanism, a third rolling bed surface, a third rolling bed surface roller, a hanger, an auxiliary supporting leg, a third movable bed surface lifting mechanism and a hinge, wherein the wheel chair frame, the second rolling bed surface and the third rolling bed surface can be detached from the bed frame to form a wheel chair individually; the auxiliary supporting leg is arranged on the bed frame to support the bed frame in an auxiliary manner; and the bed surface middle hole is a replacement channel for a mattress and a bed sheet when the mattress and the bed sheet are replaced for a patient.