The invention relates to a micronized composition containing Levonorgestrel, and aiming at the problem of low dissolution rate of the Levonorgestrel enteric coated preparation in the prior art, the invention provides the micronized composition containing Levonorgestrel. In the invention, 70 to 100 percent of Levonorgestrel is micronized to particles, and the grain diameter of each particle is less than or equal to 20 nanometers; the particles are combined with 60 to 97.9 percent of excipient to be prepared into a medicine core; and the medicine core is coated by a coating layer. The composition greatly improves the releasing degree and the peak time of the Levonorgestrel and Tmax.