The invention discloses black currant jam for bread with a long quality guarantee period and a preparation method thereof. The black currant jam mainly comprises the following components: 20 to 25 percent of flesh and pulp of black currant, 7.5 to 11.5 percent of modified starch, 3.8 to 6 percent of sugar alcohol, 2.2 to 3.7 percent of edible colloid, 0.3 to 1.1 percent of edible emulsifier, 4.4 to 9.7 percent of sucrose, 27 to 34.6 percent of syrup and 1 to 3 percent of grease. The preparation method comprises the following steps of: mixing the modified starch, the sugar alcohol, the edible colloid, the edible emulsifier, a preservative and the sucrose and stirring uniformly; adding water, the syrup and the grease, raising the temperature to 90 to 95 DEG C, and keeping the temperature until the gelatinization is complete; adding the flesh and pulp of the black currants, continuing to stir and keep the temperature, and controlling the content of a solid matter to 65 to 68 percent; andreducing the temperature, and adding an acidity regulator and an edible essence to obtain the black currant jam for the bread with the long quality guarantee period. The black currant jam for the bread with the long quality guarantee period has the advantages that: the jam has soft texture, moist mouthfeel, rich taste, high water content and low water activity, and is baking-resistant, the sugar degree is 65 to 70 degrees, the water activity is 0.75 to 0.8, and the quality guarantee period of finished bread containing the jam is 3 to 6 months.