The invention discloses a tilting device for a tilting rotor helicopter, comprising a tilting nacelle hinged on a tilting shaft, a first rod body hinged on one end with the tilting nacelle, and a slider hinged on the other end of the first rod body; The slider drives the hinged first rod body to rotate through the horizontal linear motion, and controls the tilting of the tilting nacelle in the vertical plane. The invention also discloses the tilting rotor helicopter. because the slider and the first rod body move, a helipctor mode in which a titling cabin is vertically upward and a fixed wingmode in which the tiling cabin is horizontally forward are achieved. the mutual conversion of the helicopter mode and the fixed wing mode can be realized by only a quarter of a circumferential movement. Therefore, the tilting device provided by the invention is simple in structure and can withstand high torque, and has better mechanical characteristics.