Double-spiral-wheel-driven elevator

The invention provides a double-spiral-wheel-driven elevator. The double-spiral-wheel-driven elevator is provided with a lift car, wherein driving rails are arranged on the left side and the right side of the lift car and fixed to the two sides of an elevator shaft through rail fixing frames, rail supporting assemblies are installed in the middles of the driving rails, a counterweight rail is fixed to one side or the rear side of the elevator shaft through the rail fixing frames, the upper end of a counterweight device is connected with a mooring rope and sequentially passes through a counterweight guide wheel, a lift car guide wheel, a double-spiral-wheel driving device and the lift car, no complex mechanical speed changing device exists, no more parts and no production and machining technology with special requirements exist, the elevator has the incomparable advantages of safety, maintainability, purchase, use and maintenance cost compared with a traction type elevator, the lift car is driven by the double