The design and manufacture of rail maintenance vehicles should pursue: safe operation, advanced design, reasonable structure, simple operation and convenient maintenance, and its overall technical level has reached the advanced level of similar products at home and abroad. The structure (aluminum alloy), mechanical system, electrical system and safety protection device of the rail maintenance vehicle shall comply with the current relevant norms and standards. The strength, stiffness, stability and anti-overturning properties of the rail flaw detection vehicle, each mechanism can operate safely and reliably, the vibration, noise, and environmental protection all meet the requirements of the current relevant standards, and the fire protection and safety meet the relevant national standards.