The invention relates to the technical field of 
policosanol preparations, and provides a 
policosanol-containing 
solid dispersion, the 
policosanol-containing 
solid dispersion comprises policosanol, a surfactant and a carrier, and the surfactant is a 
nonionic surfactant used for auxiliary dispersion; the particle size of the 
solid dispersion is not greater than 5 microns. The invention provides a controlled-release tablet containing policosanol and a preparation method of the controlled-release tablet. The tablet comprises a double-layer tablet core and a controlled-release film layer wrapping the double-layer tablet core; the double-layer tablet core is composed of a 
drug-containing layer and a boosting layer; the 
drug-containing layer comprises policosanol, a surfactant, a filler, a carrier, an 
adhesive and a 
lubricant; the content of policosanol in each controlled-release tablet is more than or equal to 5mg. The particle size of policosanol in the 
drug can be greatly reduced, the 
dispersity and 
solubility of policosanol can be improved, the release rate of policosanol can be controlled, the 
release time and the 
medicine taking interval can be prolonged, and then the 
bioavailability of policosanol in a 
human body and the 
medicine taking compliance of policosanol can be improved.