The low-pylon cable-stayed bridge is mainly constructed by the cable-stayed cables bearing the tension at both ends. This paper takes the prestressed concrete low-pylon cable-stayed bridge with double towers and single cable plane of Beijing-Hangzhou Bridge as the engineering background. From the construction technology of the main bridge, this paper briefly describes the construction process of the main bridge of the low-pylon cable-stayed bridge, and introduces in detail the key construction steps in the construction process of the main bridge. This paper focuses on the concrete construction process and key construction technology of the cable-stayed cable of the main tower, finally discusses the construction characteristics of the main bridge of the low-tower cable-stayed bridge and the advantages of the construction technology of the cable-stayed cable, and draws the conclusion that this technology can be popularized and applied, which provides reference and experience for the construction of the same type of bridge in the future.