Multifunctional extension ladder

The utility model discloses a multifunctional extension ladder which comprises an extension ladder body, a pair of ladder head hooks, hook lining anti-slip filler strips, a locking ring, a locking buckle and a rotary connecting piece, wherein the top of one section of the innermost layer of the telescopic ladder body is connected with the pair of ladder head hooks through the horizontal 360-degree rotating connecting piece, the hook lining non-slip filler strips are embedded in the inner sides of the pair of ladder head hooks, the locking rings are fixed at the front ends of hook openings of the pair of ladder head hooks, and the locking buckles are fixed at the hook roots of the pair of ladder head hooks. And the locking ring and the locking buckle can form a fixed connection mode, so that the hook is in a closed state. The multifunctional extension ladder disclosed by the utility model has the advantages that the hook at the top of the extension ladder can be hung on angle steel, a lead and a power transmis