The invention discloses a real-time dynamic flight path planning method based on linear programming. The real-time dynamic flight path planning method based on linear programming comprises the following steps: obtaining a coordinate point set included by obstacle boundary coordinate points according to morphological characteristic coordinates of an obstacle in a navigation coordinate system; obtaining a dynamic parameter constraint set of an aircraft according to an established discrete time model; and obtaining a flight path coordinate point set in the navigation coordinate system according to an optimal flight path target function on the basis of the coordinate point set included by the obstacle boundary coordinate points and the flight dynamic parameter constraint set. By virtue of the real-time dynamic flight path planning method based on linear programming, the technical problem in the prior art that the flight path cannot be automatically planned is solved; furthermore, the technical effect of automatically planning the flight path is achieved.