The invention relates to a device suitable for an acoustic triaxial test, and an implementation method thereof, and belongs to the field of geotechnical test calculation. The device comprises a pressure chamber, a coupling agent storage bin, a porous stone, a triaxial soil sample, a pressurized base, a gradual pressurization series bin and an acoustic probe; the top of the pressure chamber is fixedly connected with a pressure chamber cover; the pressure chamber cover and the coupling agent storage bin are integrated; the acoustic probe is put in the coupling agent storage bin, and connected with an ultrasonic acquisition instrument; the gradual pressurization series bin is arranged below the bottom surface of the pressure chamber, and communicated through a pressurization hole; the gradualpressurization series bin is connected with a hydraulic and water-pressure controller; the lower part of the coupling agent storage bin is contacted with the triaxial soil sample; the triaxial soil sample is put on the pressurized base; and the pressurized base is separately connected with a hole pressure sensor and a water quantity collection instrument. The device in the invention is simple instructure and accurate and reliable in calculation result; the problem that contact between the acoustic probe and the triaxial soil sample is non-steady can be overcome; the stability of the confining pressure flow velocity is ensured; and the device can be used for stress state evolution law observation in a triaxial soil sample loading process.