The invention discloses a processing method for a quickly frozen butterfish, and mainly solves the problems of astringent and hard mouth feel and no delicious taste of an existing butterfish product. The processing method comprises the steps of performing drip washing on a fresh butterfish, laparotomizing the fresh butterfish, removing internal organs and gills, soaking the butterfish in ozone water, cleaning the butterfish, putting the butterfish in a tray, quickly freezing the butterfish, performing cold sterilization by electronic beams, soaking the frozen butterfish and the tray in clean water for unfreezing, separating the unfrozen butterfish from the tray, packaging the butterfish, and when it is detected that the packaged butterfish is qualified, obtaining the finished quickly frozen butterfish. The processing method is reasonable in process, strong in operability and good in processing effect. The quickly frozen butterfish prepared with the method is delicious in taste, safe, sanitary, long in shelf life and convenient to eat.