Nursing bed for critical patient

The utility model discloses a nursing bed for a critical patient. The nursing bed comprises a hydraulic oil pipe, a hinge, a bed plate, a bottom plate, a hydraulic oil pump, a control panel, a bed head guardrail, a bed tail guardrail, supporting legs, universal self-locking wheels, a first lifting mechanism and a second lifting mechanism. The first lifting mechanism comprises a pulley I, a pulleyII, a back plate, two baffles II, a hydraulic oil cylinder II, a hydraulic oil cylinder III, a supporting rod III, a supporting rod II, a baffle I, a movable groove I and a movable groove II, the movable groove I comprises a fixed vertical plate I, an arc-shaped groove III and a transverse plate III, and the movable groove II comprises a fixed vertical plate II, an arc-shaped groove II and a transverse plate II; the second lifting mechanism comprises a pulley III, a hydraulic oil cylinder I, a hydraulic oil cylinder IV, a lifting frame, a supporting rod I and a movable groove III; the movablegroove III comprises a tra