System and method for assembling double-deck vehicle body

A system for assembling a double-deck vehicle body, comprising:

• a vehicle body chassis support and upper floor supports, wherein:
• the vehicle body chassis support comprises crossbeams, end supports, and an intermediate support, wherein the end supports are arranged separately at two ends of the crossbeams, the intermediate support is arranged at the middle of the crossbeams, a height of the end supports is greater than a height of the intermediate support, an upper surface of the end supports and an upper surface of the intermediate support are configured to be closely fitted to a lower surface of a vehicle body chassis;
• and
• the upper floor supports are adapted to be detachably arranged on the vehicle body chassis and support an upper floor of the vehicle body, wherein each upper floor support comprises a chassis connection frame, intermediate support frames, and upper support frames, and a width of the chassis connection frame is smaller than a width of the vehicle body.