The invention discloses a printing formula of a silk fabric. The printing formula of the silk fabric is characterized by comprising, by mass, 10-20 parts of dye, 3-6 parts of dihydroxyethyl sulfide, 2-5 parts of suspension type polystyrene resin, 1-2 parts of sodium chlorate, 4-6 parts of urea, 1-2 parts of emulsifying thickener M, 5-8 parts of ammonium sulfate, 50-65 parts of printing stock thickener and 3-6 parts of water. The printing formula of the silk fabric is simple, low in manufacturing cost and good in three-dimensional effect, and improves printing effects of the silk fabric.