The invention relates to a strain for co-production of 
unsaturated fatty acid and 
carotenoid and an application of the strain. The strain is classified and named as 
Rhodosporidium toruloides Z11, and the preservation number of the strain is CCTCC NO: M 2021226. According to the invention, through 
ion beam 
mutagenesis, the obtained 
mutant strain takes glucose as a unique 
carbon source, and the 
grease content and 
carotenoid yield in 
shake flask fermentation respectively reach 66% and 13.5 mg / g, which are respectively 2.12 times and 12.85 times of those of an original strain cultured under the same condition; the strain is high in stability, high in product yield and good in 
repeatability, and is an excellent strain suitable for being used as 
animal feed. The strain is rich in a large amount of 
protein and a certain amount of 
vitamin carotenoid, as an animal additive, the preparation process is simple, the production 
raw material source is wide, large-scale production is facilitated, the problem that residual 
mushroom dregs after 
microbial oil extraction are not suitable for animals to digest and absorb is solved, meanwhile the production cost of the 
microbial oil is reduced, and comprehensive utilization of resources is promoted.