The alternation of hydraulic gradients and high tidal range in the intertidal zone leads to the bad effect of foundation vacuum preloading,so we probe into the process optimization in fields of driving of the plastic drainage plate,and construction of the lateral sealing system and vacuum system.Verifying by the whole construction process monitoring,we obtain some positive results.The results show that the effect of vacuum preloading can be improved by adjusting the filter spacing of horizontal drainage system and adding double row sludge mixing pile as lateral sealing wall and adjusting the layout of vacuum pump.