Electric tractors have the advantages of strong power, energy saving and emission reduction, simple structure, reliability and durability, which have become the focus of research at home and abroad. A 10kW extended-range electric caterpillar tractor was developed, and the working condition analysis, electric drive system design, prototype trial production and field test were completed. The performance test and analysis were carried out for walking, rotary tillage and ditching conditions, and the results showed that the designed extended-range electric tractor was competent for the functions of traditional tractors. With the configuration, the motor output power was about 3.2kW when the tractor walked at 4.8km/h, about 3.75kW when rotating tillage at 2km/h, and about 3.3kW when ditching at 2km/h. Under the current battery configuration, it can support 2.2h walking, 1.9h rotary tillage and 2.1h ditching, and the pure electric mode can basically meet the needs of zero-emission operations in small-scale greenhouses. When continuous large load operation was required, the range extender electric tractor can start the range-extender to co-power or charge the battery. The design of the extended-range electric crawler tractor was completed，and the specific data of the electric tractor for the common working status as transporting, rotating tillage and ditching was explored. The major performance of the electric tractor, including drive system power and range extension system, was verified which provided a certain basis for the subsequent improvement and parameter optimization configuration of the extended-range electric caterpillar tractor.