The invention discloses an evaluation method and system for aircraft flight safety in a tip vortex area. The evaluation method comprises the steps that by means of a wind tunnel test, initial data ofa wing aircraft in the tip vortex area generated by a lead aircraft is calculated; position parameters of the wing aircraft in the lead aircraft and wing aircraft formation process are obtained; a Kriging response surface model is built according to the position parameters; whether current flight of the wing aircraft is safe or not is evaluated according to the Kriging response surface model and the initial data, and if yes, the position parameters of the wing aircraft in the lead aircraft and wing aircraft formation process are obtained again; if not, flight parameters of the wing aircraft are redetermined, wherein the flight parameters comprise a flight path and the flight speed. According to the evaluation method and system, evaluation on whether or not the aircraft flight in the tip vortex area is safe can be achieved, and the flight safety and comfort are improved.