The invention discloses a portable communication diagnostic instrument. The instrument includes a base, wherein the surface of the base is fixedly connected with a communication diagnostic instrument,a side surface of the base is provided with a handle, the surface of the base is provided with a screw sliding groove, the side surface of the base is provided with a pull rod groove, the side surface of the base is provided with a support groove, and a bottom surface of the base is fixedly connected with a mobile device. The instrument is advantaged in that upward movement is achieved through the handle, a pull rod slides upwards on an inner wall of a pull rod sleeve, the handle is pushed, a roller rolls, when the roller is under resistance, a second spring contracts, a lifting shaft sleevemoves upwards, a sliding rod is driven to move upwards, a second sliding block is pushed by the sliding rod to slide leftwards, a third spring is compressed by the second sliding block, after the third spring is compressed, rightward push force is generated, the second sliding block is driven to move backwards, the roller is driven to realize vibration restoration, force borne by people is reduced, and vibration damage to the communication diagnostic instrument is reduced.