Composite material vehicle body and composite material laying structure and laying method

A composite material laying structure, comprising a profile, wherein the profile is provided with a plurality of quadrilateral chambers which are butt connected and then reinforced by lapping joint, wherein the quadrilateral chambers comprise square chambers and profile chambers, and the square chambers in a square shape are transitioned into the profile chambers in a trapezoidal shape along the profile,

• wherein an outer surface of the profile is laid with multi-axial carbon fiber cloth,
• wherein inner surfaces of the quadrilateral chambers are laid with multi-axial carbon fiber cloth,
• wherein a seam for butt connection of the quadrilateral chambers and a reinforcing sheet for lapping joint of the quadrilateral chambers are located on lower surfaces of the quadrilateral chambers,
• wherein the quadrilateral chambers are in a laying form with butt connection and lapping-joint reinforcement around inner chambers,
• during the transition from the square chambers to the profile chambers, firstly, a plurality of square shapes at a first section are butted at right angle edges sequentially, and then the right angle edges of the square chambers at an end of the first section are butted with right angle edges of the profile chambers while the trapezoidal inclined edges of a plurality of profile chambers are butted with each other, the right angle edges of the profile chambers at the end of the first section are continuously butted with right angle edges of the profile chambers at a head of a second section, and the plurality of square chambers at the second section continue to be connected sequentially so that a connection form of the first section and the second section is able to repeatedly form the profile with more sections.