Method for preparing a dry fermented milk product having a high density of live bifidobacteria, comprising: a) providing an initial milk mixture, characterized in that said initial milk mixture comprises one or more ingredients selected from: - milk； - cream； - skimmed milk powder； and - combinations thereof b) optionally, add to said initial milk mixture one or more additives selected from: - protective agents for bifidobacteria； - sweeteners or sugars； - growth promoting nutrients for bifidobacteria； - dispersing agents； and - combinations thereof； c) inoculating said initial milk mixture or the mixture obtained in step b) with live bifidobacteria at a maximum concentration of 109 cfu / g； d) fermenting the inoculated mixture obtained in step c) at a temperature from 35 to 39, in particular from 36 ° C to 37 ° C, for a period of time from 4 to 6 hours and at a pH from 4.3 to 5.8； e) primary drying of the fermented mixture obtained in step d) in a spray drying chamber having an air inlet temperature from 120 to 145 ° C and an air outlet temperature from 50 to 70 ° C, during a period of time from 30 to 50 seconds, at a feed temperature below 40 ° C； f) optionally, drying the resulting product secondarily, preferably on a fluidized bed； g) recover said product； h) optionally, pack the product obtained in step g)； and i) optionally, store the product obtained in step g) or h), preferably for up to 3 months at room temperature； characterized in that stage e) and optionally stage f) are carried out until a fermented milk product powder having an aw less than 0.25 is obtained.Método para preparar un producto lácteo fermentado seco que presenta una alta densidad de bifidobacterias vivas, que comprende: a) proporcionar una mezcla láctea inicial, caracterizado por que dicha mezcla láctea inicial comprende uno o más ingredientes seleccionados de entre: - leche； - crema； - leche en polvo desnatada； y - combinaciones de las mismas b) opcionalmente, añadir a dicha mezcla láctea
