The utility model belongs to the technical field of communication testing, and particularly relates to a portable multifunctional communication tester, which comprises a tester body and a display screen, the back of the tester body is provided with a special-shaped storage groove, a mounting block is connected in the special-shaped storage groove, the connecting block is provided with a sliding groove, an elastic element is mounted in the sliding groove, and the elastic element is connected with the display screen. And an annular clamping plate is mounted at one end of the elastic element. The use convenience of the communication tester is improved by installing the annular clamping plates, firstly, the annular clamping plates are pulled out of the special-shaped containing grooves, then the annular clamping plates on one side are pulled to synchronously drive the elastic elements to move in the sliding grooves, a user clamps the annular clamping plates on the arms of the user or the stand columns, and finally the annular clamping plates are loosened, so that the communication tester is convenient to use. When the communication tester is operated, the elastic element drives the annular clamping plate to reset synchronously so as to clamp the arm of the user or the stand column, and the two hands of the user are liberated, so that the two hands are kept free when the communication tester is operated or other tasks are performed, and the working efficiency is improved.