The invention discloses a micro air oil-less compressor with metal diaphragm valves. The micro air oil-less compressor is characterized in that an air inlet is formed in a main housing, wherein a piston cylinder and an air reservoir are arranged on each of the left side and the right side of the main housing; a housing bottom cover is arranged at the rear end of the main housing; a direct current motor is arranged at the front end of the main housing; an eccentric shaft is arranged on the motor shaft of the direct current motor; two bearings are arranged on the eccentric shaft in a sleeving manner; the bearings are connected with piston rods; the pump head ends of the two piston rods are positioned in the piston cylinders respectively; a sealing rubber cup, a sealing rubber cup pressure seat and a first metal membrane valve plate are arranged on the outer side surface of the pump head end of each of the piston rods from inside to outside; a second metal membrane valve plate is arranged on the outer side of each of the piston cylinders; a piston rod gas-guide hole is formed in each of the piston rods; a sealing rubber cup pressure seat gas-guide hole is formed in each of the sealing rubber cup pressure seats; a piston cylinder gas-guide hole is formed in the outer side of each of the piston cylinders; an air outlet is formed in each of the air reservoirs. According to the micro air oil-less compressor with metal diaphragm valves, the size and noise problems of the conventional air compressor component in portable equipment are solved, and the characteristics of simple structure, small size and low noise are achieved.