The invention relates to an electric double-track wheel type flaw detection car. The electric double-track wheel type flaw detection car comprises a car frame, a detection device, a power supply device, a left scanning device, a right scanning device, a left driving wheel, a left driven wheel, a right driving wheel, a right driven wheel, a left
coupling device and a right
coupling device. The car frame comprises a car body, a left wing, a right wing, a motor
assembly, a left extension coupler, a right extension coupler, a left guiding shaft, a left guiding sleeve, a right guiding shaft, a right guiding sleeve, a left guiding device and a right guiding device. The detection device, the power supply device, the motor
assembly, the left guiding sleeve and the right guiding sleeve are arranged on the car body; the left driving wheel, the left scanning device, the left
coupling device, the left driven wheel, the left guiding device, the right driving wheel, the right scanning device, the right coupling device, the right driven wheel and the right guiding device are arranged on the left wing and the right wing. The flaw detection car is convenient to arrange, disassemble and convey, and can be manually put away and extended, the detection accuracy is improved and the cost is low.