In order to solve the problem in the process of coconut juicing during labor consumption, inefficiency, wasting of coconut resources and other issues, we designed an automatic coconuts tapping machine based on the PLC combined with Hooke's Law, machine group and the cam spring link group release, and storage of potential energy regularly. With the studying by the transfer of coconut, opening and other processes, and completing the process of coconut punch awl periodic entry and exit, we also used PLC (Programmable Logic Controller) to make coconut opening efficiency visualized, feeding and opening of coconut during belt start-stop control. The machine was found to show excellent performance, working stably and safely and easily operated. The machine could promise a prospect of automation coconut juicing application.