The invention discloses a high-altitude cable construction car which comprises a compartment. The top of the compartment is of an opening structure. Idler wheels are arranged on the outer edge of the side walls on two sides. The idler wheels are connected with the compartment in a rotating mode through rotating shafts A. One rotating shaft A is in transmission connection with a driving device fixed in the compartment through a transmission device. The high-altitude cable construction car is simple in structure, the driving device drives the construction car to move, the moving speed of the construction car is improved, the labor intensity of operators is lowered, double hands of each operator can be released when the construction car moves so that the operators can carry out construction or maintaining conveniently, and production efficiency is improved.