The invention discloses a method for treating excrement by using
hermetia illucens. The method comprises the following steps: pretreating the excrement, namely proportioning a leaven with a degradation agent to prepare a microbial inoculum; preparing the excrement; weighing the microbial inoculum and
sugar-containing coarse grain
powder; mixing the
sugar-containing coarse grain
powder with the microbial inoculum, then adding the mixture into the excrement, stirring continuously, and performing sealed treatment on the mixture in a
fermentation tank; inoculating larvae, namely horizontally paving the pretreated excrement, and inoculating the hatched
hermetia illucens ova into the excrement; and performing material-worm separation, namely adding
sawdust or / and rice
bran powder into the material-worm mixture, and vibrating to separate out material residues and fresh worms, thereby obtaining an
organic fertilizer prepared by the method. According to the method for treating the excrement by using the
hermetia illucens and the
organic fertilizer prepared by the method, the excrement is treated into a semi-fluid stage beneficial for eating by
insect larvae, other nutrients are not needed, the treated excrement can be used as the
organic fertilizer which is high in conversion rate, and meanwhile, one
ton of the excrement is high in
larva yield, so that the cost is reduced, the environmental
pollution is reduced, and a high-value organic
fertilizer rich in
insect protein and
nutrition is obtained.