Abstract: The energy consumption of transportation system is an important part of the energy consumption of air conditioning chilled water system. The circulating resistance of each component of the cooling water system in typical metro station is summarized and analyzed, giving a simplified formula for calculating the electricity consumption to transferred cooling quantity ratio of primary pump system with the same type of pumps and the limit for the head of pumps, providing reference for design. Electricity consumption to transferred cooling quantity ratio of the chilled water system in metro station is generally close to the limit value, thus the most disadvantageous hydraulic loss of the loop should be strictly controlled. The design head of pumps should not be greater than 40 m. The resistance should not be greater than 200 Pa/m.