The invention relates to a three-phase electric energy meter calibrating device. An industrial personal computer in a control box body is connected with a computer, a test power source and a word display power source in the control box body are connected with a meter hanging rack through a conversion box, and a control box is connected with an ST-EC3 meter position calculating module, an ST-XS1/2/3 display module, a carrier wave switcher, an ST-9001T time base signal source, an SC 4200A humiture tester and a multifunction tester. By means of the three-phase electric energy meter calibrating device, devices such as the test power source, the industrial personal computer and the word display power source are added into the control box body by means of a control box body and a meter hanging rack of an original calibrating device according to conditions of the original calibrating device, a carrier wave module is added so that a novel calibrating device can perform carrier wave communication, word display and multifunction calibration instruments are added, and brand-new calibration functions such as word display testing, communication detection, rate time bucket checking, tripping and closing testing, identity authentication and secret key downloading can be achieved as well as basic metering calibration function.