Abstract: The arrival of 5G communication era provides new opportunities for the development of communication operators, but also brings new challenges. The construction of 5G communication needs more and more iron tower resources. However, the tower companies also face many difficulties such as limited land resources, long construction period and large capital pressure. By mounting the antenna of the communication base station on the power tower, the wider coverage of communication signals can be achieved without building a new communication tower. The shared tower construction needs to consider many issues, such as equipment installation, operation and maintenance, lightning protection and grounding, electromagnetic interference and so on. Based on the analysis of key technologies, this paper firstly proposes three kinds of business models for shared towers, namely, direct leasing, brief leasing and joint venture construction. Based on the actual calculation example and the difference net present value method, this paper analyzes the rental costs under the direct leasing mode, and analyzes the income of the grid company, the tower company and the third-party company in the different business modes. By comparing the income differences of different parties under different rents and contribution shares, the change rule and feasible range of annual rents and contribution shares of the sharing tower are summarized.