Multi-seat chair with cushion capable of changing angle of inclination through power generation of back

The invention relates to the technical field of sofas, and discloses a multi-seat chair with cushion capable of changing an angle of inclination through power generation of the back. The multi-seat chair comprises support legs, wherein the upper parts of the support legs are fixedly connected with a lower plate; the upper part of the lower plate is movably connected with a backrest; when a user sits on the upper part of the lower plate, a foot pad inside the support legs is pulled out to relax legs; when the backrest needs to be inclined, power is continuously generated by the back, right-angle springs are extruded, the backrest is inclined downwards, the back of a limiting rod moves together, the backrest is in touch with a push rod, the push rod moves forwards, a connecting rod moves rightwards synchronously, a connecting block moves rightwards, a sliding groove is formed in the surface of the connecting block, a spring is extruded, the sliding groove moves rightwards synchronously,a circular rod moves to t