The invention discloses an intensified disturbance mass transferring device and method for desulfurization of boiler flue gas. The device comprises a fixed hook and a motor, which are mounted under a supporting beam of a spraying layer of a boiler flue gas desulfurization tower, wherein the fixed hook is arranged at the top of the motor; an output shaft at the bottom of the motor is a rotary shaft; a transmission disc is arranged at the tail part of the rotary shaft; a nail screw circular disc is fixed on the transmission disc; and a plurality of screw strips are mounted at the outer edge of the nail screw circular disc. According to the device and the method, disclosed by the invention, mixed mass transferring of desulfurization slurry and raw flue gas is intensified through a forced disturbance manner; and the aims that the boiler desulfurization efficiency is improved, the power consumption of a slurry circulating pump is reduced, equipment is safe and reliable, arrangement and modification are convenient, environmental protection is realized and standards are reached can be realized.