Processing formula of fried bean curd: (Take 20 kg of dried bean curd as an example) 20-50 g of Tianxi fried bean curd foaming agent (Xindu Crisp), 0.4-0.6 kg of magnesium chloride (brine) or gypsum. Technological process: grinding the soaked beans (the ratio of water to beans is 8: 1)→ boiling → cooling to 75-85℃→ adding bean cake (dissolved with a little cold water in advance) → marinating → standing and solidifying for 20 minutes → scraping and squeezing → tofu (2.5-2.8 kg of tofu is made from one kg of dried beans) → frying (frying).