The invention relates to a delayed type magnetic coupler with an actuating apparatus and a radial ejector rod. The delayed type magnetic coupler is characterized by comprising an input side catcher (1) connected with a drive motor, input side steel discs (2) connected with the catcher, auxiliary steel discs (4) connected with the input side steel discs (2), wherein output side steel discs (5) are mounted on the right sides of the auxiliary steel discs (4) and connected with the auxiliary steel discs (4); copper discs (3) are fixed on the input side steel discs (5), the auxiliary steel discs (4) and the output side steel discs (5). According to the delayed type magnetic coupler with the actuating apparatus and the radial ejector rod, provided by the invention, when an actuating mechanism of the magnetic coupler works, through the combined action of an inner guide sleeve, an outer guide sleeve, a sliding sleeve and the ejector rod, the magnet in the auxiliary magnet disc can perform radial motion in the sliding groove of the auxiliary magnet disc in the external circumference direction, so that the magnetic coupling surfaces of rotating copper conductor discs and the auxiliary magnet disc are gradually enlarged, the torque needed in the starting state for overcoming the static frictional resistance torque is gradually increased, and the phenomenon that the torque is inadequate during the starting stage is changed.