Abstract: Abstract: This study aims to improve the contradiction between the power and economy of tractor in field operation. A comprehensive mode switching mode was developed for the tractor with the hydro-mechanical continuously variable transmission (HMCVT). The engine torque and fuel consumption model, the HMCVT model, and the tractor dynamic model were built to consider the slip rate of the driving wheel. The economic and dynamic mode switching was introduced the weight coefficient for the power and economy under different working conditions. At the same time, the economic and dynamic speed of mode switching was taken as the constraint of comprehensive mode switching speed. The weight coefficient was solved by the fuzzy reasoning, according to the throttle opening and speed. The multi-objective evolutionary and decomposition were used to optimize the weight coefficient to deal with the comprehensive mode switching speed under different throttle opening. Then, the comprehensive mode switching was worked out. The dynamic and economic performance, as well as the comprehensive mode switching were applied to the mode switching strategy module for the simulation and comparative analysis. The simulation results show that the mode switching speed and the fuel consumption rate of comprehensive mode switching were between the power and economic mode switching under the throttle opening of 0.5, compared with the economic mode switching. The speed of mode switching was reduced under the comprehensive mode switching, indicating the less power loss, and the improved power performance, compared with the dynamic mode switching. There was the lower fuel consumption rate corresponding to the mode switching speed of the comprehensive mode switching, indicating the improved economy. The comprehensive mode switching presented both the power and economic mode switching. The mode switching speed was adjusted in the real time, according to the actual operating conditions of the tractor, indicating a reasonable distribution of power and economy. Meanwhile, the mode switching test was conducted on the experimental bench to verify the accuracy of the comprehensive mode switching, where the throttle opening was set as 0.5. Correspondingly, the simulation data was basically consistent with the experimental data. Therefore, the tractor can be expected to switch the mode, according to the set comprehensive mode switching at high speed and large throttle opening, which verified the effectiveness of the comprehensive mode switching. Therefore, the comprehensive variable speed can fully meet the demand of power performance and economy of tractor under different working conditions. The findings can also provide a theoretical reference to formulate the mode switching in tractors.