A new method to combine hardware with software was discussed,it synchronized acquisition time of sick laser scanner and IMU to GPS time,GPS time was regarded as start time and data integration reference time,and the different sensors synchronous fusion in sick laser scanning system was achieved by following algorithm.According to the comparison with the point cloud digram of before and after system time synchronization modification,error factors of the time synchronization were analysed in detail,the approach of time synchronization provides an example that the type of the laser scanner can be used in the laser scanning measurement system based on the small vehicle,and also provides a reference for similar equipment time synchronization.