The invention relates to a method for testing the vibration rheological property of cement mortar. Frequency conversion vibration equipment is combined with a rheometer to test the rheological property of the cement mortar. In the test method, the composition, vibration frequency range and vibration amplitude of the frequency conversion vibration equipment are defined. The rheometer has the characteristics of rotor rotation speed, torque, resolution, and sample volume suitable for evaluation of mortar rheological property. According to the method for testing the vibration and rheological properties of the cement mortar provided by the invention, the matching simulation of the frequency conversion vibration equipment for the vibration compaction process and the advantage of the rheometer inaccurate evaluation of the rheological properties of the cement mortar are combined; based on the practice of compaction of the cement mortar, the rheological behavior of the cement mortar under thevibration state is accurately evaluated; and an important basis is provided for optimization and control of the working performance.