The invention belongs to the technical field of beds, and particularly relates to a nursing bed capable with a replaceable bed sheet. The nursing bed comprises a bed frame, bed guardrails, deformationmechanisms, a first handle, a second handle, bed support plates, a first shaft, a second shaft, first arc guide rails, first synchronous belts, second synchronous belts, second arc guide rails, deformation wheels, first right-angular bent plates, second right-angular bent plates and the like; a worker swings the first handle to make the deformation wheels deform from a flat wheel state to an approximately round wheel state and swings the second handle or the first handle to drive the deformation wheels to rotate, the bed sheet is replaced through the rotating deformation wheels, and thereforethe purpose of replacing the bed sheet under the condition that a patient does not need to get out of the bed can still be achieved; the nursing bed is simple in structure and has a good use effect.