The detection of multiple unresolved targets is critical in radar technology. To precisely detect multiple unresolved targets is a prerequisite and the basis of all other processes. For monostatic radar, the detection method of multiple unresolved targets based on the complex indicated angle difference technique is first analyzed and then extended to multistatic radar. The detector of multiple unresolved targets is designed and simulation tests are presented under several scenarios. Moreover, the effect on detection performance of SNR, sensor number, and the geometrical configuration of targets and sensors are analyzed. The results show that with the same SNR, the multistatic radar detector performs better than the monostatic radar detector.