Abstract: The laser heating process of flying cylinder is discussed by means of geometry analysis. The meaning of heating configuration is defined and explained, the significance of this item in describing effective heating of the flying cylinder is pointed out. The distribution of the time width of heating configuration in the space above the ground is also discussed. The rules of locating the laser setup for effective heating of the flying cylinder are summarized. Selecting certain relative time width isoline according to the ratio between the laser's effective operation time and the flying time of the cylinder, and determining an effective area on the ground using the isoline as the boundary, the laser can be set on the point closest to the trajectory in the area. The dynamic heating has a maximu