Disclosed is a test method for judging the playing correctness of users customized color ring back tone, which belongs to the mobile communication technology field. The test method includes steps as following: mark all the color ring back tones stored in IP playing device with watermarks in advance; a test center launches the test through a tandem exchange office, then connects to a test number adscription GMSC, then switches to the adscription IP playing device through the adscription GMSC, and at the same time, records the test starting time and the sent test number; a voice channel is established between the adscription IP playing device and the test center, and plays the customized color ring back tone of the tested number to the test center, and the test center records the test responding time and the received color ring back tone; then the test center detects the watermark of the received color ring back tone, and compares with the user customized color ring back tone message so as to judge whether the users customized color ring back tone plays correctly. Without affecting user apperception, the method of the invention improves the test correctness and can choose any user number for the test.