The invention relates to a method for measuring a motion state of any mass point of a cylinder spiral spring under impact load, comprising the following steps of: (1) fixing one end of the spring, setting a row of sensors for detecting the mass points passing through the spring; (1) exerting the impact load on a free end of the spring, moving the spring to a fixed end; (3) recording the time of the detecting mass point passing through the sensor and the corresponding displacement according to the sensor detecting information; (4) drawing the relationship curve between the displacement and thetime of all the detecting mass points; (5) obtaining the relationship curve of the speed and the accelerated speed changed along with the time; and (6) the detecting mass points representing the movement relationship of all the mass points on the spring. The method provided by the invention can ensure the displacement, the speed and the accelerated speed of any mass point in any time so as to effectively and rapidly detect the spring performance parameters and to improve the spring design and increase manufacturing quality. The method is rapid and accurate in measurement, and short in period;the measuring apparatus established by the method is low in cost and easy to realize.