There are several key issues in dynamic monitoring of subsurface structures,such as signal-to-noise ratio( SNR),repeatability of seismic sources and accurate measurement of velocity. Using a large volume airgun source,we constructed a high-performance active system which mainly consists of airgun excitation and signal reception. In order to reduce the platform drift from the shot position,we put forward the platform drift control technique. Experimental results show that the technique can effectively solve the problem of platform drift from the set position under fluid impact after airgun excitation. The results of this study can be a reference for repeated airgun source detection at certain excitation sites. There are several key issues in dynamic monitoring of subsurface structures, such as signal-to-noise ratio (SNR), repeatability of seismic sources and accurate measurement of velocity. Using a large volume airgun source, we constructed a high-performance active system which mainly consists of airgun excitation and signal reception. In order to reduce the platform drift from the shot position, we put forward the platform drift control technique. impact after airgun excitation. The results of this study can be a reference for repeated airgun source detection at certain excitation sites.