Abstract: In TBM tunelling, energy consumptions during TBM driving are different subjected to geological condi? tions, so the study of TBM energy consumption is of great significance for economic and efficient construction. Firstly, according to the working principle of TBM, the energy consumption calculation formula and parameters optimization formula are established. Secondly, taking the double shield TBM construction in the water convey tunnel of Lan?zhou water source project as the background, the relationships between TBM energy consumption and penetration under different geological conditions are analyzed. Finally, according to a large number of measured data, the function relationships between penetration and thrust, cutter torque are fitted, and the TBM driving parameters are optimized according to energy consumption, equipment performance and stability of surrounding rock. The results show that, with the decrease of rock classification, TBM energy consumption decreases, the TBM energy consumption in class Ⅲ granite drops about 45% contrast to that in class Ⅱ granite; TBM energy consumption decreases with the increase of penetration, and the reduction decreases gradually; the penetration has exponential relationship with driving thrust and linear relationship with cutterhead torque.