Referring to the principal of active drill string heave compensation control system, the experiment table of the system was designed and set up.A realtime control system was set up by using xPC target of Matlab/Simulink,the fuzzy PID controller was applied to the heave compensation control system,and some experiments were carried out.The interface based on LabVIEW was designed.The results shows that the heave compensation control system based on fuzzy controller has good compensation performance,and it can compensate the heave motion of different frequency.