The present invention discloses a microcapsule mustard essence which consists of wall materials and core materials; the wall materials are prepared by using the following components in parts by weight: starch sodium octenylsuccinate 5.0-25 parts, soybean protein isolate 1.0-5.0 parts, sodium caseinate 0.1-3.0 parts, maltodextrin 20-60 parts and thickening agents 0.2-6.5 parts; and the core materials comprise the following raw materials in parts by weight: natural mustard oil 1.0-20 parts and/or allyl isothiocyanate 1.0-20 parts, and fragrance enhancing and coordinating agents 0.4-1.5 parts. The microcapsule mustard essences have high embedding rate and good heat resistance, can improve the stability of the mustard oil, overcome the shortcomings of highly volatility and strong irritation of liquid essences used in the past, and not easily being preserved in products, and better exert the fragrance of the mustard oil; and at the same time, the wall materials of the microcapsule mustard essences are widely accessible, have low production cost, and can be widely promoted and applied.