Telescopic angle brace of cast-in-place structure mold and construction method of cast-in-place structure mold

The invention relates to a telescopic angle brace to solve the technical problems that an existing adjusting corner post is complex in structure and difficult to disassemble quickly. The invention provides a cast-in-place structure mold telescopic angle brace and a construction method of a cast-in-place structure mold. The cast-in-place structure mold telescopic angle brace comprises a corner post and a threaded guide post, and the threaded guide post is rotationally installed on any side face of the corner post; supporting plates are rotationally installed on the pair of side faces, adjacent to the side face where the threaded guide column is located, of the corner column. A driving block is constructed on the threaded guide column in a threaded mode, two symmetrically-distributed U-shaped blocks are arranged on the side, away from the corner column, of the driving block, and an included angle alpha is formed between the two U-shaped blocks and is alpha gt; 0; connecting rods are slidably constructed in the