The invention discloses a power supply type voltage transformer with a voltage metering function. The power supply type voltage transformer comprises a first component, a power output unit, a voltagemetering unit, a current transformer and compensating impedance devices, wherein the first component is used for receiving a first voltage from a voltage input end; the power output unit is used for outputting a second voltage to the voltage input end so as to realize power output; the voltage metering unit is used for realizing voltage metering so as to obtain a third voltage; the current transformer is used for measuring load current; the compensating impedances are serially connected with a voltage metering winding of the power output unit and are connected with the current transformer in parallel, and is used for compensating the voltage drops, on the primary side leakage reactance and the secondary side leakage reactance of the voltage metering unit, of the load current when the loadof a user is changed so as to realize the compensation for the error of voltage metering. A certain number of compensating impedance devices are connected on the load current in parallel, and the compensating impedance devices are serially connected onto the circuit of the voltage metering unit winding, and the error meets the metering-level error limiting value requirement when the power is fullof load output from 0.