The invention provides a double-layer storage rack for a wind turbine tower. The double-layer storage rack comprises a bottom frame, supporting rods, a bottom plate, a top plate, clamping mechanisms and fixing mechanisms. The bottom frame is located at the lowest end and fixed to the ground. The four sets of supporting rods are arranged, and the lower ends of the supporting rods are fixed to the upper end face of the bottom frame. The bottom plate is movably arranged on the supporting rods. The top plate is fixed to square sleeves on the supporting rods through bolts. The clamping mechanisms are fixed to the two sides of the upper end face of the bottom frame. According to the double-layer storage rack, double-layer storage of the wind turbine tower can be achieved, the distance between the bottom plate and the top plate can be adjusted through hydraulic rods, and the wind turbine tower can be conveniently taken and stored; in addition, during use, a square base can be rotated and fixed through the bolts, the fixing positions of the fixing bolts can be adjusted, and the fixing degree of the wind turbine tower is improved; and a ball structure is arranged in a rotating base, the rotating base can rotate smoothly, a fixing claw can clamp the wind turbine tower by controlling a motor, mounting of the wind turbine tower is facilitated, and the wind turbine tower does not need to be used in cooperation with a crane during mounting.