The invention discloses a rotary lifting installation and construction method and device for a large-span lifting component. The construction method comprises a lifting beam, a hydraulic lifter and a conversion device arranged between the lifting beam and the hydraulic lifter. The conversion device comprises a first installation base connected with the lifting beam, a second installation base connected with the hydraulic lifter and a rolling connection part enabling the first installation base and the second installation base to rotate oppositely. The large-span lifting component is provided with lifting lugs connected with steel strands of the hydraulic lifter. According to the rotary lifting installation and construction method and device for the large-span lifting component, the large-span lifting component and the lifting beam are arranged oppositely and obliquely, so that the large-span lifting component penetrates through an interspace between brackets and drives the hydraulic lifter to rotate through a connection part rotationally arranged at the bottom of the hydraulic lifter; and thus, the large-span lifting component is set right and installed on the brackets. According to the rotary lifting installation and construction method and device for the large-span lifting component, the structure is simple, operation is convenient, safe and reliable, the construction efficiency is high, and the method and the device can be widely applied to lifting installing of the large-span lifting component.