Using WJG-3000 rotary wing fluidized dryer, the total heat at the inlet of the given dryer is not less than 2.4 million kcal, the hot air is 500 ℃, and the penicillin mycelium is not more than 80% after being dehydrated by the belt machine. Under the conditions, the penicillin mycelium is dried to a moisture content of less than 12%, and the output is not less than 600kg/h.