Power-assisted standing-up and sitting-down seat with bionic shape and motion trail seat surface

The invention relates to a power-assisted standing and sitting seat with a bionic shape and a motion trail seat surface, which comprises a seat main body comprising a bottom plate, a backrest and seat legs; the supporting plate extends upwards from the bottom plate along the backrest or is fixed on the backrest; a transmission assembly; a pair of driving gears; driven half gears are arranged at the lower ends of the lifting plates, and the half gears are meshed with the driving gear; the upper surface of the seat surface is in a curved surface shape simulating the buttocks of a human body, and the back surface of the seat surface is fixedly connected with the pair of lifting plates; and the driving mechanism synchronously and respectively drives the first connecting rod to rotate around the hinge shaft, drives the second connecting rod to rotate around the hinge shaft, drives the third connecting rod to follow up, drives the driving gear to rotate, and synchronously rotates under the meshing of the driven hal