The invention discloses a scenic sightseeing boat anti-swing device and an anti-swing method. The device comprises a boat body, wherein a groove is formed at the bottom of the boat body; and a balancing weight is arranged in the groove and connected with the boat body through a lifting mechanism. The lifting mechanism is a shears-fork type electric lifting mechanism. The balancing weight is of a spindle-shaped structure. In the invention, the swing and side turning can be effectively prevented in the case of wind waves or boat body imbalance, and the boat navigation safety is guaranteed.