Abstract: Electric tractors have the advantages of simple structure, energy saving and emission reduction. However, the existing electric tractors use a single power battery to operate with short endurance. In order to improve the long-term power supply capability of electric tractors, this paper proposes a DC double power parallel current sharing joint power supply scheme based on droop control, and uses MatLab/Simulink to build the system model. In the aspect of simulation test, the single power supply can realize the boost and voltage stabilization control. The current sharing of dual power supply based on droop control can realize current sharing of dual power supply. When switching different power loads, the system voltage decreases proportionally with the increase of power, which verifies the feasibility of the scheme.