The invention provides a nosiheptide finemeal extracting method. The nosiheptide finemeal extracting method comprises the following steps of adding a filter aid in inactivated nosiheptide fermentation liquor; performing centrifugal treatment to obtain filter residues; adding dichloroethane in the filter residues; stirring for 0.5-1 hour at the temperature of 45-50 DEG C; filtering; keeping the filtrate standing until the filtrate is layered; taking an organic phase to obtain a nosiheptide extracting solution; performing reduced pressure distillation to recycle dichloroethane; adding deionized water at a room temperature; filtering; washing filter cakes with water and drying the washed filter cakes; and grinding the filter cakes to obtain nosiheptide finemeal. The distilled out dichloroethane can be directly recycled and used. The potency of the nosiheptide finemeal obtained by the method is 970 ug/mg, products do not contain mycelium, and yield reaches up to 93%. A nosiheptide extracting technology is simple, extracting efficiency is high, a dichloroethane solvent can be recycled and reused, so that wastewater pollution is reduced, production cost is reduced, and nosiheptide finemeal is suitable to be produced industrially.