The invention relates to an exercise device, in particular to a children ball beating exercise device. Therefore, the technical problem of the present invention is to provide a children ball beating exercise device is capable of alleviating the fatigue of a physical education teacher and reducing the occurrence of a service error phenomenon. The children ball beating exercise device comprises a mounting frame, an annular slide rail, an annular slide block, a mechanical box, an electric motor, a first roller, a swing plate, a second roller, a rubber pad, a grip rod, a firing cylinder, a first guide sleeve; an annular slide rail is arranged at the top of the mounting frame, an annular sliding block is arranged on the annular slide rail, a mechanical box is connected at the top of the annularsliding block, an electric motor is installed on the upper part of the inner rear wall of the mechanical box, an output shaft of the electric motor is connected with a first roller through a coupling, and a swing plate is rotatably connected on the left side of the lower part of the inner rear wall of the mechanical box. The invention can adjust the direction of the launching barrel and further can control the launching direction of the ball by the gym teacher rotating the mechanical box.