The invention belongs to the technical field of processing of marine food, and provides a preparation method for sardine surimi. The preparation method is characterized by comprising the steps as follows: 1), pretreatment is performed; 2), crushed ice water and sodium hypochlorite which are respectively 70-80 percent and 0.1-0.3 percent of weight of fillets are added into sardine fillets to perform rinsing, and the temperature of water is controlled within 6-10 DEG C; 3), vacuum low-temperature dehydration is performed; 4), the dehydrated sardine fillets are placed into a cutting machine to be cut into meat paste, then chitosan, glutinous rice flour, dairy salt, white granulated sugar and beer which are respectively 0.5-1.0 percent, 5-8 percent, 1-2 percent, 2-4 percent and 5-10 percent of weight of the meat paste are added, water is added to adjust the moisture content to be 70-80 percent, and blending is performed for 20-30 min, and the temperature of the sardine surimi is kept within a range of 4-8 DEG C during blending; 5), forming and heat treatment are performed. According to the preparation method for the sardine surimi, the gel quality of the surimi product can be significantly improved, high whiteness and good taste are realized, and the commercial value of the sardine surimi is improved.