Abstract: Overall structure of KAMAT pump station and RMI pump station which have high domestic market share were introduced. Key technologies in terms of deceleration system, hydraulic system, lubrication system, protection system and control system were comprehensively compared and analyzed. Their respective advantages and disadvantages were summarized, and their improvement directions were pointed out: for KAMAT pump station, processing technology and quality of gear shaft, as well as hydraulic system structure should be improved; for RMI pump station, crankshaft strength of deceleration system should be strengthened, and high-pressure seal module design of hydraulic system and arrangement of suction and discharge valve plug seat should be improved.