Sucker Rod Pump (SRP) is a heavy equipment used to pump oil(fluid) from the ground.The purpose of this study is to determine the numerical solution of displacement problem onthe polish rod in the sucker rod pump. From previous studies displacement can be simulatedand calculated by numerical solutions using the finite difference method. Here, the Piecewise-Linear Base method is used to simulate displacement on the polish rod. This method has higheraccuracy than finite difference method. Moreover the numerical solution will be comparedto the analytic simulation of the problem to confirm the robustness of the numerical method.From the simulation results, L1 error rates are obtained 2.00911 x10?17at?x= 0.2,3.30195 x10?17at?x= 0.05and 1.45114 x10?16at?x= 0.02