Automobile seat multi-stage inflation system and control method thereof

The invention discloses an automobile seat multi-stage inflation system and a control method thereof; wherein the inflation system comprises an air bag arranged in an automobile seat; a plurality of air pumps that are respectively communicated with the air bags through air pipes; a base; a plurality of execution mechanisms which are mounted on the base and are arranged in one-to-one correspondence with the air pumps, wherein each executing mechanism comprises a fixed pulley fixedly installed on the base; a driving machine body fixedly installed on the base, and the driving machine body and the fixed pulley are arranged at intervals; a rotary valve element, wherein one end is connected to the driving machine body through a flexible hinge, and the other end of the rotary valve element extends to an air inlet of the air pipe. a memory alloy wire, wherein one end is fixedly connected to the base, and the other end of the memory alloy wire winds around the fixed pulley after being wound around the driving machine