In order to weaken chattering phenomenon of robotic manipulators, a method of fuzzy trending law is presented. It applies fuzzy controller to adjust the parameters of trending law of sliding mode control timely, while saturation function is introduced into trending law design, and then a new trending law is proposed. This method can not only ensure the speediness and robustness of the control system, but also weaken chattering effectively. In addition, the design of the control system is simple, so it can be easily applied to engineering. The simulation results show that the scheme can not only control the chattering effectively but also achieve a fast and accurate tracking, thus enhancing the operational performance of robot manipulators.