The invention relates to a small-scale environment-friendly and energy-saving small-power electric tractor for a farm tool. The electric tractor comprises a machine body, a rack and a three-point hanger, and is characterized in that two sides of the front part of the machine body are provided with counterweight batteries, and the rack is fixed on the rear portion of the machine body; the back portion of the rack is provided with electric push rods and the three-point hanger through bolts, and the electric push rods are arranged on two sides above the three-point hanger; the middle of the diagonal of the three-point hanger is provided with a driving motor of the farm tool, and the driving motor of the farm tool is fixedly connected with a rear power output shaft; a trailer and a sub-seat are mounted on the rear of the rack through bolts, and the sub-seat is mounted above the trailer. According to the small-scale environment-friendly and energy-saving small-power electric tractor for a farm tool, the environmental pollution is reduced, and no resource waste is produced; besides, since the counterweight effect of the counterweight batteries can makes the balance of the machine body good, the electric tractor has the advantages of being wide in use function, convenient to operate and capable of improving the labor efficiency.