The invention discloses a monostation radar target characteristic measurement method for identifying the positions of synchronous scattering points. The method comprises the following steps: establishing a three-dimensional rectangular coordinate system in a darkroom; determining the position where an emitting-receiving antenna is in the three-dimensional rectangular coordinate system; taking the position where an emitting-receiving antenna is as the center of a circle, taking the distance between the position where a target to be measured and the position where the emitting-receiving antenna is as a semi-diameter, and constructing a ball surface in the darkroom; enabling the synchronous scattering points to be positioned at the intersections of the ball surface and all surfaces of the three-dimensional darkroom and objects in the darkroom. According to the method, the positions of synchronous scattering points that scattering signals of the target to be measured reach the emitting-receiving antenna simultaneously in the darkroom can be quickly searched; by uniformly adding wave-absorbing materials with high performance at the positions or finding a solution to remove scattering sources, the scattering signal strength of the parts can be greatly reduced, and the influence of scattering of the parts on the measurement accuracy of the scattering signals of the target to be measured is reduced.