The invention relates to a coil spring combined elastic mechanism through rope transmission. The mechanism has a function meeting the torque requirements required by vehicle suspension elastic elements through amplifying the torque of a coil spring as well as a function of changing stiffness, and can be applicable to suspension use for passenger vehicles, rail vehicles and engineering vehicles aswell as weight balancing use for a mechanical arm, and is also used as an energy storage mechanism for a vehicle short-period traction or launch device. The specific structure of the mechanism is composed of a first side plate 2, a second side plate 9, an outer cylinder 1, a steel wire rope shaft 4, a left-side coil spring 3, a right-side coil spring 13, an output steel wire rope groove cylinder 11, an output connecting shaft 5, two disc bevel gears 19, a small bevel gear 20, a small worm wheel 21, a worm 25 and a motor 26, and is particularly suitable for suspension use of electric automobiles.