Cross connection structure

The invention relates to a cross connection structure which comprises a first sectional material and a second sectional material which are in cross connection. The cross connection structure is characterized in that the first sectional material is internally provided with a cylindrical connection pin, and the connection pin penetrates out of the two ends of the first sectional material; the two ends of the connection pin are provided with two connection grooves respectively, and the two connection grooves are symmetrically arranged on the two sides of the connection pin; connection angle codes are clamped to the connection grooves of the connection pins, one end of each connection angle code is provided with a first clamping groove, the side, opposite to the corresponding first clamping groove, of the other end of the corresponding connection angle code is provided with two clamping pins, and a second clamping groove is formed between the two clamping pins; the connection angle codes are connected with the se