The invention discloses a log-domain analog wavelet inverter for testing electric power harmonic wave, including many parallel log-domain analog filters and adjustable biasing current circuits connected to every filter, the adjustable biasing current circuit is adjusted to form filter CMOS log-domain integrator bias current, for realizing wavelet transform of harmonic signal in different scales, under micro power consumption condition, the circuit achieves real-time integer and non-integer times electric power harmonic wave test, the invention is particularly suitable for applying in new small type high-speed portable electric power harmonic wave tester.