Green transportation is the object of transportation in the future, and reducing energy consumed in transportation is of great significance to sustainable development of the society. This paper mainly studies the impact of line slope between stations on the energy consumed by the train. The paper starts with description of typical line conditions between stations. Three control modes: traction, coasting and braking are considered in the process of train running. Based on these, the basic dynamic model of the train running energy consumption, and the corresponding energy-saving operation algorithm are set. Then, in the presumption that the distance between stations of urban rail transit is 3 km, energy consumption curve of the train and the corresponding velocity curve distribution of different slope and slope length are analyzed, and the optimal combination between station section line slope and train energy-saving operation was obtained. This provides a reference for the design of station section lines based on train energy-saving operation in urban rail transit.