Medical sickbed structure with adjustable lifting and folding position of rear chair back

The utility model discloses a medical sickbed structure with a lifting and folding position-adjustable back chair back, which comprises a bed main body structure, a lifting and folding position-adjustable back chair back and a lifting and folding position-adjustable back chair back, fixing the pin shaft rod; the positioning plate body structure comprises a fixed side plate and a positioning connecting plate; the fixed side plate is integrally and fixedly connected to one side part of the bed main body structure; the supporting plate body structure comprises a middle supporting plate and a tail supporting plate which are arranged in parallel, level and connected with the bed main body structure; one side part of the middle supporting plate is fixedly connected to the fixed side plate through two detachable fixed pin shaft rods, and the other side part of the middle supporting plate is fixedly connected with the tail supporting plate through a positioning connecting plate and two detachable fixed pin shaft rods