The invention mainly relates to the technical field of planting, and discloses a cultivation method of 
selenium-enriched 
toona sinensis. The method includes the steps of seed soaking, low-temperature 
refrigeration, 
selenium-enriched treatment and seed 
germination; the method is simple, the obtained 
toona sinensis is blackish green in color and luster, thick in 
flavor, fresh, crisp and palatable, the 
selenium content reaches 23.78 micrograms per 100 grams, the quality of the 
toona sinensis is improved, and compared with traditional 
toona sinensis, the 
economic income of the obtained 
toona sinensis is increased by 21.4%; the 
toona sinensis is soaked in a dietary-alkali solution, the 
softening of seed wing membranes is accelerated, the 
seed dormancy is broken, the 
sprouting is accelerated, and the work efficiency is improved; the low-temperature 
refrigeration is conducted on seeds, the 
stress resistance of the seeds is stimulated, the activities of 
dormancy substances in the seeds are reduced, the 
sprouting of the seeds is accelerated, and the absorption on 
nutrient components is promoted; selenium-enriched 
nutrient liquid is continuously sprayed on the refrigerated seeds many times, and the selenium-enriched 
nutrient liquid is obtained through 
fermentation and extraction, wherein the 
fermentation is conducted under the effect of beer 
yeast; the selenium-enriched nutrient liquid provides abundant nutrients and has anti-
bacteria and pest killing effects, the 
stress resistance of the toona sinensis seeds is improved, so that the toona sinensis grows strongly, and the production efficiency is improved.