The invention provides a wireless interference testing method and a wireless interference testing system. According to the wireless interference testing method, the wireless interference testing system is set up, communication links among devices in the wireless interference testing system are established, and accordingly, anti-interference tests for LTE-V2X communication links in a shielded-roomenvironment are realized. The wireless interference testing system comprises a shielded room, an interference unit, a combiner, an emitting unit and a receiving unit, wherein the interference unit, the combiner, the emitting circuit and the receiving unit are located in the shielded room. During wireless interference testing, an emitting terminal and a receiving terminal are arranged in a first shielding box and a second shielding box respectively, so that radiation electromagnetism of the emitting terminal in lab interference tests is prevented from entering the receiving terminal to cause radiation interference, and testing effectiveness and accuracy are improved greatly. In the shielded-room environment, accurately-rationed and parameter-adjustable interference source signals can be realized by a signal generator, so that testing accuracy and reoccurrence degree are improved while testing time is shortened effectively.