Modified fish gelatin, preparation method and application thereof, yoghourt, low-fat solidified yoghourt and preparation method thereof

The invention relates to the field of milk products, in particular to modified fish gelatin, a preparation method and application thereof, yoghourt, low-fat solidified yoghourt and a preparation method thereof. The method for modifying the fish gelatin comprises the following steps: mixing the fish gelatin with xanthan gum, and carrying out dynamic high-pressure micro-jet treatment on the obtainedmixture in a solution state so as to modify the fish gelatin. The preparation method of the fish gelatin solidified low-fat yoghourt comprises the following steps: mixing black Chinese wolfberry, themodified fish gelatin, low-fat milk and sugar, and sequentially carrying out second homogenization, sterilization and fermentation on the obtained mixed solution to obtain primary yoghourt; and thendispersing and refrigerating the primary yoghourt to obtain the fish gelatin low-fat solidified yoghourt. When the method is used for treating the fish gelatin, the gel strength, viscosity and water holding capacity of the fish