Cabin changing module connecting piece

The invention provides a cabin changing module connecting piece. The cabin changing module connecting piece comprises a connecting piece body, bolts and fixing attached seats, the upper surface and the lower surface of the connecting piece body serve as connecting faces of a cabin changing module horizontal deck and a vehicle body lower vertical deck respectively, U-shaped grooves are machined in the two connecting faces respectively, counterbores are machined in the two outer surfaces opposite to the two connecting faces respectively, a plurality of bolts penetrate into the counterbores from the two surfaces of the connecting piece body respectively, the heads of the bolts are hidden in the counterbores, and the threaded parts at the front ends of the bolts extend into the U-shaped grooves and are in threaded connection with the fixing attached seats; and the fixed attached seat sis hidden in the U-shaped grooves and are flush with the connecting surface of the connecting piece body. Integrated design of a m