With the innovation of suspension bridge structure and the continuous breakthrough of span, higher requirements are put forward for the bearing capacity and intelligent level of cable-supported crane, the core equipment for erection of long-span main girder. The traditional cable crane has some problems, such as insufficient bearing capacity of the whole machine and relatively low intelligence in the hoisting process, which leads to limited construction efficiency and prominent safety risks. In view of the above challenges, the 1,000-ton cable crane is based on the construction of Beikou Bridge in Oujiang, Wenzhou. Through structural integration and technological innovation, it has realized the functions of automatically crossing the cable clamp during walking, self-adaptive adjustment of traction angle, intelligent leveling and remote intelligent maintenance during hoisting, effectively avoiding the safety risks caused by manual operation errors, and improving the safety factor of crane selection with higher overall bearing capacity. In this paper, the structural design assembly, key technical innovation and main technical parameters of 1000t cable-supported crane are systematically expounded, which provides a feasible technical scheme and theoretical basis for improving the safety performance and intelligent operation and maintenance ability of cable crane.