A cost model is built for transformation of tractors with diesel into electric tractors. Then economic assessment of the transformation is carried out by the life cycle cost, sensitivity coefficient and payback period of incremental investment (IPBP). Results show that the cost of electric tractor transformation increases significantly with the increase of power, but the transformation is limited by the weight and volume of the chosen battery pack, as well as the driving time. The life cycle cost of the transformed electric tractor is about 60% of that of the tractor with diesel, although the cost of electric tractor transformation is 2–5 times higher. The price of electricity and the unit cost of battery pack have a great impact on the life cycle cost. And the maximum IPBP is 2.053 years, but it leads to the exponential increase of the IPBP with the increase of the price of electricity, while the linear decrease of IPBP with the decrease of the price of battery pack. It is more economical to transform tractors with diesel into electric tractors when the price of agricultural electricity remains unchanged but the price of battery pack falls due to the development of battery technology.

建立了一种成本模型，用于将柴油柴油拖拉机转换为电动拖拉机。然后，通过生命周期成本，敏感性系数和增量投资的回收期（IPBP）对转型进行经济评估。结果表明，电动牵引车改造的成本随着功率的增加而显着增加，但这种改造受所选电池组的重量和体积以及行驶时间的限制。改造后的电动拖拉机的生命周期成本约为柴油拖拉机的生命周期成本的60％，尽管电动拖拉机的改造成本要高出2到5倍。电价和电池组的单位成本对生命周期成本有很大影响。IPBP的最大值是2.053年，但是随着电价的增加，IPBP呈指数增长，而随着电池组价格的降低，IPBP呈线性下降。当农用电的价格保持不变但由于电池技术的发展而使电池组的价格下降时，将带柴油的拖拉机转变为电动拖拉机更为经济。