To overcome the deficiency of classical Z-N method in optimization of PID parameters,an intelligent optimization algorithm for PID parameters was proposed.The stimulation and experiment results show that the PID parameters getting from this algorithm are efficient,accurate and speedy.The algorithm was used for hydraulic control system of jumbolter.The stimulation and experiment results show that when the peak oil pressure of the relief chamber is changed,optimum algorithm will find suitable pressure based on max power requirement to change displacement of relief surface,which lead to changing displacement of impact piston,at the same time,it will change the impact power and frequency of the impactor,so working parameters can be changed automatically based on the different situation under suitable parameters and max power working condition.The experiments show it has certain reference value for other control objects and control process.