The invention provides a gravity self-driven sitting / standing power and
defecation assisting device of a pedestal pan and a using method. The gravity self-driven sitting / standing power and defecationassisting device comprises a
toilet seat and a power assisting device, wherein the
toilet seat is mounted on the power assisting device; the power assisting device is a spring power assisting device or an air pressure power assisting device. The
toilet seat can be lifted, and when an old person sits down and stands up, the toilet seat provides certain support for the old person under the action ofa spring II or an air cylinder II, so that the old person is assisted to sit down and stand up, and the danger of the old person during
defecation is reduced; and a power assisting and
defecation assisting mechanism of a pedal structure is added, so that a
sitting posture is converted into a squatting posture, a proper defecation angle is formed, and defecation is smoother. Meanwhile, the pedal mechanism becomes a power assisting mechanism during standing up. The gravity self-driven sitting / standing power and defecation assisting device is of a pure mechanical structure, is driven by the bodyweight of a user during defecation, can be self-adaptive to the driving sequence and gravity distribution, and can still be normally used without
electric energy. The gravity self-driven sitting / standing power and defecation assisting device is wider in application range, can work in an environment without
electric power, such as a public washroom, and is simple in structure, convenient to maintain and low in cost.