1. A method for scheduling discrete event simulation, comprising: extracting two or more event types in the discrete event simulation in response to having loaded the discrete event simulation; constructing a correlation graph used for the discrete event simulation based on the two or more event types; and scheduling events that are classified into the two or more event types, according to the correlation graph, wherein each node in the correlation graph describes one of the two or more event types, and an edge in the correlation graph describes the creation relationship or dependency relationship between the two or more event types.