Abstract: Described in the paper are the steel pipe hydrostatic pressure testing machine，and the pressure stabilization methods with four different devices，i.e.，the high pressure pump，the high pressure tank，the pressure booster and the pressure-stabilizing cylinder，and the working principles thereof.Also summarized and compared are the process technological characteristics of the four methods.Finally，it is suggested that proper pressure stabilization method be determined reasonably by companies concerned for their future hydrostatic pressure testing machines in a bid to not only meet relevant process requirements，but also improve productivity，and thus the profitability.