The invention provides a voltage and current synchronous keyed dynamic power signal generating device, which comprises a three-phase voltage U input terminal, a three-phase current I input terminal, a dynamic voltage control unit, a dynamic current control unit, a control terminal and a three-phase voltage and current output terminal, wherein the dynamic voltage control unit generates dynamic voltage by driving controllable silicon groups to realize alternate conduction by control signals CON1 and CON2 in a mode that a three-phase voltage transformer and two voltage control controllable silicon groups are respectively connected in series; the dynamic current control unit generates dynamic current by driving the controllable silicon groups to realize alternate conduction by control signals CON3 and CON4 in a mode that a three-phase current transformer and two current control controllable silicon groups are respectively connected in series. The device has the advantages that through the synchronization of the control signals CON3, CON1, CON4 and CON2, the synchronous output of dynamic voltage and dynamic current is realized; the problem that the electric energy meter dynamic property test can be only performed under the dynamic current condition in the prior art is solved; wide purposes are realized in the field of electric energy meter dynamic property test.