The invention relates to a power system alarm fault model definition method, computer equipment and a storage medium. The power system alarm fault model definition method is characterized in that a robust power grid event model structure is designed in combination with the characteristics of various power grid events, and the model realizes the definition of the power grid events by maintaining the incidence relation between complex models. According to the invention, the common event information of the power system is defined through the data model, and the method for configuring the data model through the human-computer interaction interface so as to realize the common event definition of the power system is provided.