Large-length high-voltage smooth aluminum sleeve cable laying construction method and system

The invention discloses a large-length high-voltage smooth aluminum sleeve cable laying construction method and system, the construction system comprises an active pay-off rack, a cable pay-off rack, an active wire feeder, a winching machine and a tension pay-off dancer, and the active pay-off rack comprises a pay-off rack base, a rotating roller and a pay-off servo motor; the cable pay-off rack comprises a bent support and a pay-off rack guide roller; the driving wire feeder comprises a driving wire feeder support, two groups of wire feeding rollers and a wire feeding servo motor, and a wire feeding channel is formed between the two groups of wire feeding rollers; the winching machine is provided with a traction steel wire which is connected with a waterproof traction head of the cable; the tension pay-off dancer is arranged between the cable pay-off rack and the active wire feeder; and the pay-off servo motor and the wire feeding servo motor correspondingly drive the rotating roller and the wire feeding rol