Abstract: An elastic diaphragm pump comprises a fixed housing. A motor is fixedly connected to a bottom portion of the fixed housing. An end of an output shaft of the motor extends into the fixed housing, and is fixedly connected to a gear. A central shaft is rotatably connected between inner walls of the fixed housing. A transmission gear and an eccentric wheel are sequentially and rotatably connected to a surface of the central shaft. A pull rod is rotatably connected to a surface of the eccentric wheel. A lower fixing seat is fixedly connected to a top portion of the fixed housing. An elastic diaphragm is provided on a top portion of the lower fixing seat. A nut is fixedly connected to the center of the elastic diaphragm. An upper suction cover is provided on a top portion of the elastic diaphragm.