The invention provides a wire discharging sliding vehicle. The sliding vehicle comprises a support rack, a wire wheel ad a steel filament rope wheel. The wire wheel is rotatably connected with the support rack. The sliding vehicle is characterized in that a support plate is arranged on the support rack; the steel filament rope wheel is rotatably connected with the support plate and the diameter of the steel filament rope wheel is smaller than the diameter of the wire wheel. Through the improved design of the structure of the sliding vehicle, weight reduction of the wire discharging sliding vehicle is achieved or reduction of transmission and discharging during construction is achieved. According to the invention, a small-diameter steel filament rope is adopted to replace a big-diameter steel filament rope wheel, so the whole quality of 3-wheel wire discharging sliding vehicle is effectively reduced and transmission and hoisting of the sliding vehicle are facilitated. Meanwhile, independent die processing carried out on the big-diameter steel filament rope wheel is avoided and manufacturing cost of the sliding vehicle is effectively reduced.