Lifting device for replacing bracket of wind power blade without crane

The invention relates to the technical field of wind power generation equipment, in particular to a lifting device for replacing a support of a wind power blade without a crane. A lifting device for replacing a support of a wind power blade without a crane comprises a U-shaped bearing frame, two stiffening beams are symmetrically connected to the inner side face of the rear end of the U-shaped bearing frame, one end of each stiffening beam is connected with the rear end close to the U-shaped bearing frame through a connecting piece, and a rear lifting assembly is arranged on the outer side of the rear end of the U-shaped bearing frame. A front lifting assembly is arranged at the front ends of the U-shaped bearing frame and the reinforcing beam, two driving steering assemblies are symmetrically installed on the inner side of the U-shaped frame, the upper surface of the rear end of the U-shaped frame is vertically connected with a rear H-shaped frame, the inner side of the upper end of the rear H-shaped frame i