The innovative equipment of wellhead device with suction pile can effectively solve the related technical problems arising from offshore oil and gas development in the complex environment of the South China Sea. In this paper, through Orcaflex simulation analysis and Abaqus finite element analysis, the sensitivity analysis of the water entry process in the splash zone of the double-well suction pile, the suction calculation of the suction pump during the mud entry process of the double-well suction pile, the analysis and calculation of the mud entry attitude control strategy of the double-well suction pile are carried out on the single-well suction pile and double-well head model, and the dynamic response law of the suction pile when the splash zone is lowered is obtained The magnitude of suction required by suction pile during negative pressure penetration and the change rule of soil ultimate bearing capacity. The simulation results show that when lowering the suction pile, the crane speed should be reduced to reduce the water entry speed, reduce the water facing area, and increase the counterweight to avoid the relaxation of the cable; The required suction value of suction pile in the process of mud can be 3235.2kN-3709.94kN, and its corresponding bearing capacity can reach 9271kN-10289kN.