A scheme based on high-precision synchronous clock and work in harmony of GPS and oven controlled crystal oscillators was proposed in this paper to achieve the requirement of the data acquisition for microtremor exploration. The role of the scheme is to generate data acquisition of synchronous pulse and coordinated universal time information. And the information is modulated and demodulated by frequency shift keying. After each observation instrument received demodulated information and to delay the phase correction. Each observation instrument get data acquisition synchronization pulse and the world coordinate information. The test and experiment results show that the UTC information can accurately record the time for data collection, synchronization accuracy is better than 200 ns for data acquisition in this system. This method solves the requirement of high accuracy of synchronous in the observation instruments, improving the accuracy of the microtremor exploration.