The invention discloses a point suction type wave energy electricity generation device based on wave gathering by adopting multiple piles, and belongs to the technical field of wave energy electricitygeneration. In order to solve the problem that a single point suction type electricity generation device is low in electricity generation power, and a connecting rod structure bears large bending moment, the electricity generation device is designed. An electricity generation unit and the piles are installed on a support, and the piles are distributed surrounding the electricity generation unit;a floater is connected to the electricity generation unit through a spherical hinge connecting mechanism and a rigid connecting rod; the support is used for installing the piles and the electricity generation unit, the electricity generation unit is used for converting mechanical energy oscillating up and down of the floater into electric energy, and the rigid connecting rod is used for transferring the mechanical energy oscillating up and down of the floater; the spherical hinge connecting mechanism is used connecting the floater and the rigid connecting rod, the spherical hinge connecting rod allows the floater to rotate around the spherical hinge connecting mechanism, and the floater is used for collecting wave energy; the piles are used for gathering the wave energy to the position ofthe floater, and an anchor chain is used for fixing the position of the whole electricity generation device in a sea area. The electricity generation device is used for electricity generation on the sea.