The invention relates to the technical field of livestock breeding, in particular to a method for disinfecting inside and outside of a livestock house. The method comprises the following steps: carrying out flushing by a high pressure water pump; carrying out spraying with disinfecting water; carrying out suffocating; carrying out weeding and feces shoveling; soaking a tool with the disinfecting water; disinfecting a storage room; steaming an inoculating vaccine apparatus; and disinfecting air with livestock and the like. Halfway disinfection of livestock house is the primary reason that the fed livestock is sick, and the primary reason that the livestock house is disinfected halfway is as follows: the disinfecting sequence is incorrect: for example, the outer side of the livestock house is disinfected and then the inner side of the livestock house is disinfected, the storage room, the tool and the apparatus are not disinfected, the air in the livestock house is not disinfected, and the components of the disinfecting water and disinfecting drug are not reasonable. According to the primary reason, measures are taken in a targeted manner; by reasonably formulating the disinfecting sequence, disinfecting air in the livestock house and reasonably preparing the disinfecting water and the disinfecting drug, the problems that the fed livestock is sick to dead as the livestock house isdisinfected halfway are solved effectively.