The invention belongs to the control technology of electric power transmission and distribution networks, and relates to a method for verifying validity of a decoupling pentagonal wiring automatic bus transfer operating mode. A power transmission and distribution network applied to the method is a pentagonal wiring decoupling automatic bus transfer device with a primary main connecting wire of a power substation as dual-power supply, the level of the power substation is 220 kV or below, the main connecting wire of the power substation of the power transmission and distribution network applied to the method is a standard pentagonal connection wire, and a logic algebra expression (pleas see the formula in the specification) is met by decoupling pentagonal wiring automatic bus transfer. The method has the advantages that the decoupling pentagonal wiring automatic bus transfer device operating mode is checked and calculated by the logic algebra, and simplicity and clearness are achieved; the method for checking and calculating the decoupling pentagonal wiring automatic bus transfer device operating mode through the logic algebra is convenient to implement and easy to understand.