To solve the network in the testing process automated testing system, test instruments and equipment to maintain strict time synchronization between, on the IEEE1588 high-precision time synchronization protocol for a study focusing on the IEEE1588 clock servo system is analyzed. The current clock servo system is improved by adding the PI controller algorithm based on single neuron on clock servo system, and process experimental verification proof. The results show that compared with other network synchronization protocol, PIP can achieve high synchronization accuracy.