Fuente: WIPO "dairy products" The invention provides a lactobacillus helveticus strain EuAs-D-L7 and an application thereof, and the lactobacillus helveticus strain EuAs-D-L7 is characterized in that the preservation number of the strain is CGMCC (China General Microbiological Culture Collection Center) No. 24421. The strain disclosed by the invention has the characteristic of high temperature resistance, and can tolerate the heat treatment strength of 60 DEG C/10min, and the viable count can still reach 107cfu/mL after the heat treatment of 60 DEG C/10min. The strain is applied to dairy fan products produced traditionally or industrially, the viable count of beneficial bacteria in finished products can be increased, meanwhile, growth of escherichia coli and staphylococcus aureus can be inhibited, and the shelf life of the products is prolonged.