Stretching adjustment maintenance ladder for hydraulic engineering

The invention discloses a stretching adjustment maintenance ladder for hydraulic engineering. The stretching adjustment maintenance ladder comprises first support frames, fixing blocks, a first support rod, second concave grooves and support columns, wherein a second support frame is fixed below the first support frame, a reinforcing column is arranged inside the second support frame, a first fixing column is fixed on the outer wall of the first support frame, bolts are fixed on the surface of the outer wall of the first fixing column, and the fixing blocks are arranged on the upper end and the lower end of the first fixing column. According to the present invention, the first support frames, the second support frames and the third support frames are integrally connected respectively through the first fixing columns and the second fixing columns, and are respectively and integrally fixed to the first fixing columns and the second fixing columns through the bolts, and the maintenance ladder can stretch through