The invention relates to a connecting structure of a concrete tower drum and a steel tower drum. The provided connecting structure of the concrete tower drum and the steel tower drum is reliable in structure, precise in abutting joint, simple in construction technology and low in construction cost. According to the technical scheme, the connecting structure of the concrete tower drum and the steel tower drum is used for connecting the concrete tower drum with the steel tower drum located above the concrete tower drum. The connecting structure of the concrete tower drum and the steel tower drum is characterized in that the connecting structure is provided with an end steel plate and a concrete leveling layer; the end steel plate is fixed to the top surface of the concrete tower drum through a prestressed steel strand pre-buried in the concrete tower drum; the concrete leveling layer is formed on the upper portion of the end steel plate in a poured mode; the steel tower drum is installed on the concrete leveling layer; the end steel plate is connected with the steel tower drum through connecting bolts pre-buried in the concrete leveling layer. The connecting structure of the concrete tower drum and the steel tower drum is suitable for the field of wind power generation.