The invention discloses a communication simulation type moulded case circuit breaker device. By virtue of an RS-485 bus communication way, data values such as current and voltage are written into an intelligent type moulded case circuit breaker, the intelligent type moulded case circuit breaker carries out protection operation according to a set protection value and existing protection parameters and input state, and a mutual inductor is used for calculating according to measurement parameters written in and then is used for display and communication. The communication simulation type moulded case circuit breaker device can be applied to a teaching simulation practical training system, students can visually see application of the intelligent moulded case circuit breaker in a power distribution room, the students also can be helped to deeply understand variation of various kinds of data and parameters in a protection process, a true load does not need to be loaded in the whole process, the whole process is realized by adopting a full communication way, and the safety of a simulation experiment is guaranteed while the cost of the simulation experiment is reduced.