The aim of presented research is the construction of mathematical model of ethnic field. The model is described by the system of parabolic equations. It is the tools for research the evolution of interactive ethnic systems under landscape influence. The ethnic system includes a few ethnoses and provides their interactions. The interactions transmit by ethnic fields. This model describes the behavior of society on ethnic solidarity level. The software TERRI is used for the forecast of arising the ethnic conflicts. We carry out analysis of simulation results of ethnic fields: ethnic map coloring; delimitation three borders between super-ethnoses on the ethnic map of investigation region; comparison the experimental data with the facts; relationship of ethnic fields model with real ethnic processes. Based on simulation result the researcher can compute the direction of ethnic field distribution and the most probable points of skirmish between ethnoses.