Connecting mechanism of combined tower

The embodiment of the invention provides a connecting mechanism of a combined tower. The connecting mechanism is characterized by comprising a steel tower cylinder, a concrete tower cylinder, a pre-buried plate, a reinforcing device and a prestress bunch fixing device and a flange, the flange comprises an annular body, the annular body is provided with N longitudinal through holes, and the N longitudinal through holes are formed in the circumferential direction of the annular body; the concrete tower cylinder is internally provided with prestress bunches matched with the longitudinal through holes of the flange, the prestress bunches penetrate through the concrete tower cylinders, and the far ends of the prestress bunches penetrates through the concrete tower cylinder to penetrate through the longitudinal through holes of the flange; the prestress bunches are uniformly arranged to surround the cylinder body of the concrete tower cylinder and are connected with the flange; preferably, the connecting mechanism