The invention relates to an insulated angle lifting platform for live working. The insulated angle lifting platform comprises a movable base, support rods fixed on the base and a frame arranged on the support rods and is characterized in that two rectangular frames, namely an inner frame and an outer frame which have a similar shape are composed of longitudinal beams, transverse beams and upright columns, wherein each longitudinal beam is made of a sectional bar with a groove on the cross section, and the inner frame is inserted into the outer frame to form a telescopic frame by mutually buckling the grooves of the longitudinal beams of the inner frame and the outer frame. A pulley is arranged on each of four transverse beams of the outer frame and each of upper and lower transverse beams at one end of the inner frame, an electric winding drum and a pulley are arranged on the base, a drawing rope from the electric winding drum sequentially passes through each pulley and then returns to the electric winding drum. Each of the longitudinal beams, the transverse beams and the upright columns is made of a section bar of an insulated epoxy resin material. The insulated angle lifting platform disclosed by the invention can be used for maintaining various equipments in a substation in an electrified manner and ensuring personal safety and equipment safety of working.