The invention discloses a non-linear spring set structure and a use method thereof. The spring set structure comprises a cylinder structure and a sleeve structure which are sleeved, the cylinder structure comprises a first mounting plate, multiple cylinders which are coaxially sleeve are perpendicularly arranged on the first mounting plate, an elastic element is arranged between two adjacent cylinders, a mounting end and a free end are arranged on the elastic element in the elasticity direction, the mounting end of the elastic element is fixedly arranged on the first mounting plate, the free end of the elastic element faces the sleeve structure, the sleeve structure comprises a second mounting plate, multiple sleeves which are coaxially sleeved are perpendicularly arranged on the second mounting plate, the sleeves can be sleeved between the two adjacent cylinders in a sliding manner, and the corresponding elastic element is compressed. Through the structure and the method, according todifferent application scenes, and different pressure magnitudes, matching is achieved, and the beneficial effects of being easy and convenient to use, flexible and changeable in matching manner, capable of improving the spring application scene and the like are achieved.