Trailer-type generator sets are innovative in design, with high mobility, low center of gravity, safe braking, excellent fabrication and beautiful appearance. The reasonable choice of joint has high strength and good steel property. The height adjustable bolt is suitable for tractors of various heights. The four corners of the frame are equipped with mechanical support devices to ensure the safety of the fuselage. It has guiding function, steering and braking indicator lights, and standard plugs for taillights.