Abstract: A new research field about ice nucleation active (INA) bacteria and INA protein has been studied in American,Japan,Canada and other countries.Since INA bacteria was first detected by L.R.Maki in 1974.Bacterial ice nucleation has been applied to agriculture,food,medicine,entertainment and many other fields.Studies of INA bacteria in our country began in 1986.Our studies were mainly concerned about the species and their distributions on pattern,insect pests control by accelerating their frozen point with INAbacteria.This paper reported the progress on the studies of INA bacteria and INA protein.Its prospective development and application were also discussed.

Key words: Ice Nucleation Active Bacteria INA Protein Summarize