The invention discloses a multi-communication protocol intelligent sensing method, which can be used for power distribution and utilization Internet of Things edge calculation, and comprises the following steps: constructing a lightweight deep neural network model for power distribution and utilization Internet of Things edge calculation; training the lightweight deep neural network model throughprotocol frame data of various different communication protocol types to obtain a pre-training model; deploying the pre-training model into a multi-protocol intelligent sensing system of a power distribution and utilization terminal; and the multi-protocol intelligent sensing system performs sensing reasoning on the received protocol frame data according to the pre-training model so as to identifythe protocol type of the received protocol frame data. The multi-communication-protocol intelligent sensing method can be applied to edge calculation of the power distribution and utilization Internet of Things, various application protocols can be rapidly sensed on the edge side, and interconnection, intercommunication and plug-and-play of access equipment of a power distribution and utilizationterminal are promoted.