The invention discloses a crimping device of an electronic component and a crimping method thereof. The crimping device comprises a frame, a fixing clamp, a crimping member, a transmission gear sleeve, a transition gear, a driving motor, a driving gear, a control case, a slide rail and a distance measuring sensor. The transmission gear sleeve is internally provided with a ball screw. The screw vertically penetrates through the upper part of the frame, and the bottom of the screw is connected with the crimping member. The fixing clamp is fixed on the worktable of the frame. The lower part of the frame is provided with a slidable control box and a proximity switch. The control case is internally provided with a controller. The frame is provided with the distance measuring sensor for detecting the distance between the crimping member and the fixing clamp. The driving motor, the proximity switch and the distance measuring sensor are electrically connected with the controller. According tothe crimping device and the crimping method, the driving motor is made to perform forward and backward rotation through the controller, and the ball screw is driven to perform crimping or separation,thereby realizing high transmission stability and high transmission accuracy and preventing electronic component damage. Furthermore automatic switching-off can be performed when the crimping device is not in use, thereby preventing danger caused by maloperation and realizing high safety.