The invention relates to the technical field of locking mechanisms, in particular to a locking mechanism of a retractable cane. The locking mechanism comprises a cane main body, a handle is fixedly arranged on the top of the cane main body, the interior of the handle is a solid wood layer, and an anti-corrosion layer is fixedly arranged outside the solid wood layer; an inflatable layer is fixedlyconnected with the outer portion of the anti-corrosion layer, a shell is fixedly arranged on the outer wall of the cane main body, anti-slide threads are arranged on the surface of the shell, a connection block is fixedly connected with one end of the top of the cane main body, and a stress spring is fixedly connected with the top of the connection block; a pressing block is fixedly connected withthe top of the stress spring, a U-shaped connection element is fixedly connected with the side, close to the side wall of the handle, of the pressing block, a pin head is fixedly connected with the end, away from the pressing block, of the U-shaped connection element, an outer pipe and a limit block are fixedly connected with the bottom of the handle, the limit block is located in the outer pipe,and the bottom of the limit block is movably connected to an inner pipe. Through scientificity and practicability of the whole structural design, the locking mechanism of the retractable cane is moreconvenient to use, simpler in structure and lower in cost.