This paper suggests a simulation model of monoprcdator two prey species system as follows: The research on the behaviour of the simulation model shows several conclusions as follows:( 1 ) A certain degree of the mutual interference between predator individuals increases the stability of the model.( 2 ) A certain degree of predator aggregation attack increases the stability of the model.( 3 ) The more the predator depends its prey, the more stable the model is.( 4 ) A certain degree of the positive switching...