Gelatin is widely used in food coatings. The surface coating of gelatin in the food has the following advantages: (1) When the two kinds of different food combinations together, coated with gelatin can inhibit the browning reaction. (2) the prevention of food to absorb moisture and rigidity (3) allows the surface gloss of food to improve food quality. (4) prevents oxidation of food spoilage. (5) gelatin as a stabilizer to prevent product shrinkage deformation. (6) fresh role in the soaked fruit, vegetables, sugar, add gelatin solution, film formed on the surface of fruits and vegetables can guarantee food freshness and natural flavor.