A nursing bed for sitting excretion comprises a strength saving transmission device arranged inside the bed frame； a bed board device arranged above the strength saving transmission device； an excretion device arranged between the bed board device and the strength saving transmission device； the strength saving transmission device drives a driving mechanism by a power output shaft, and the driving mechanism drives a first elevation rod and a second elevation rod, the first elevation rod drives the back moveable frame to be leaned, the second elevation drives the leg moveable frame to be lowering； The present invention uses the law of the lever to achieve providing a device with strength saving feature, and further achieve the effects of allowing the patient excreting with sitting posture to reduce the discomfort and increase the convenience, and achieve self-caring.
