The invention provides an ultraviolet light cured silk screen snowflake printing ink and a preparation method thereof. The ultraviolet light cured silk screen snowflake printing ink which has a viscosity of 1500-3000cps at the temperature of 25 DEG C is prepared by materials of 50-60 parts of ultraviolet light curable resins, 5-8 parts of photoinitiators, 0.5-1 part of defoamers, 0.5-1 part of flatting agents, 0.1-0.2 part of polymerization inhibitors, 9-13 parts of wax powders, 5-15 parts of trimethylolpropane triacrylate, 5-15 parts of 1, 6-hexanediol diacrylate and 7.3-12.4 parts of colored printing ink which are firstly subjected to a predispersion at a medium speed of 200rpm to 500rpm for 30 minutes in a disc mixer, and then subjected to a dispersion at a high speed of 3000rpm to 3500rpm for one hour. The ultraviolet light cured silk screen snowflake printing ink has the advantages that the appearance is unique, the decorative pattern is delicate, the weather resistance is good, the smell is mild, the printing ink is environment-friendly, printed products touch smooth, and the like.