The invention relates to the technical field of food production processes, and provides a preparation method of linseed nougat. The preparation method of linseed nougat comprises the following steps: gel preparing, sugar dissolving, boiling, pulp flushing, beating for inflating, mixing and blending, product molding and packaging, thereby obtaining the finished product. The prepared linseed nougat contains 10-20% of cooked linseed prepared by a cold baking technique, linseed contains rich unsaturated fatty acids omega-3 series (alpha-linolenic acid) and omega-6 series (gamma-linolenic acid), lignan, EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), and the linseed has important effects of regulating blood lipid, reducing cholesterol, preventing emphraxis, reducing blood viscosity, preventing and curing diabetes, reducing blood pressure, reducing weight, inhibiting anaphylaxis, diminishing inflammation, protecting eyesight, enhancing the intelligence of adolescents and the like. The linseed nougat is soft and fluffy in texture, fine in structure, fragrant and sweet in taste and thick in milk fragrance, and has a nutritional health care property, good soft and chewy mouthfeel and strong practicability.