Vertical-roll motion decoupling control suspension system

The invention discloses a vertical-roll motion decoupling control suspension system which is composed of a rocker arm assembly, a cross rocker arm, a spring damping assembly and a rod piece assembly. The rocker arm assembly comprises a left rocker arm and a right rocker arm; the spring shock absorption assembly comprises a first spring shock absorber, a second spring shock absorber and a third spring shock absorber; the rod piece assembly comprises rod pieces correspondingly connected with the ends of the three spring shock absorbers, a first connecting rod and a second connecting rod. The crossed rocker arm is composed of four rotating plates which are stacked up and down, the two rotating plates located in the middle form a first crossed rocker arm, the two rotating plates located on the outer layer form a second crossed rocker arm, and the first crossed rocker arm and the second crossed rocker arm are arranged in an X shape. The structure of the rocker arm is simplified, and the aim of decoupling the linea