There are several key issues in dynamics monitoring of subsurface，such as signal to noise ratio(SNR)，repeatability of seismic sources and accurate measurement of velocity. Using large volume air-gun source，we constructed a high-performance active system which mainly consist of air-gun excitation and signal reception. In order to reduce the platform deviating from the shot position，we put forward platform drift control technology. Experimental results show that the technology can effectively solve the problem of the dislocation of rafts caused by air-gun stimulation. The results of this study can be a reference for the repeated exploration by active air-gun seismic source in some excitation sites.