Hit accuracy is the most important criterion for testing the combat capability of aviation weapons, and as a companion product, the circular probability error of the target is equally important. The accuracy index of a certain type of target simulating the American made JDAM series bomb is also an important part of interception tests for ground to air weapon systems. By sorting out the sources of errors in a certain target system, an error tree was established, and the accuracy of the target system was analyzed and studied. The accuracy of the landing point was calculated through theoretical analysis methods, and then simulated shooting analysis and live ammunition shooting were carried out to further verify the scientific and reasonable theoretical research methods. This allows for a relatively fast and lowly analysis of accuracy indicators in theoretical design, guiding subsequent design, and has certain theoretical and practical significance.