The invention relates to an electric horn using mems mic as a driving circuit and a sound production control method. The traditional electric horn produces a frequency signal by using a 555 timer or an IC to drive an MOS transistor to produce induced electromotive force to enable the horn to produce the sound, the manufacturing cost is high, the volume is large and the reliability is low. The electric horn disclosed by the invention is composed of a diaphragm (12), the diaphragm is pressed and fixed through a gland (11) and a shell seat (2) male end; a coil skeleton (3) is arranged between the diaphragm and the shell seat; the coil skeleton is fixed at the inside bottom of the shell seat; a controller (5) and a binding post (4) are arranged on the side surfaces of the coil skeleton; the binding post is connected with a wiring harness on a vehicle; a connecting bolt (13) is fixed at the lower center of the shell seat; the external thread of the connecting bolt is fixed on the vehicle steel frame after penetrating from the shell seat; and a horn case (1) is fixed on the upper part of the shell seat. The electric horn disclosed by the invention is used as the electric horn of a motor vehicle.