The invention discloses a multilevel realization method of short run-length recording mark edge modulation of a multilevel red disc with a channel spacing which is more than or equal to 0.52 micron. The method comprises the steps as follows: A. determining level numbers of the short run-length recording marks according to corresponding relationship of a corresponding table of multilevel disk modulation coding run-length level; B. determining change numbers and values of parameters T1 and T2 of a write strategy vector according to the level numbers of the short run-length recording marks, wherein the write strategy vector W is equal to [T1T2], the parameter T1 is used for controlling the position of the left edge of the short run-length recording marks, and the parameter T2 is used for controlling the position of the right edge of the short run-length recording marks; C. utilizing the write strategy vector to control the power of a laser recorder to write and realize the short run-length recording marks; and D. identifying levels of recording marks according to the change of the position of the short run-length recording mark edge. The realization method changes microstructures of the recording marks according to the change of the position of the short run-length recording mark edge, and realizes multilevel of the short run-length recording marks, thus increasing the red digital disc storage capacity.