The invention discloses a transformer test platform, and belongs to the technical field of electronic power and electronics. The transformer test platform disclosed by the invention is composed of a first AC/DC module, a DC/AC module, a transmission reactor and a second AC/DC module. The first AC/DC module converts external AC power into DC power, and DC voltages are adjustable; the DC/AC module converts the DC power into the AC power, and the AC power is connected with the primary winding of a transformer to be tested after passing through the transmission reactor; and after secondary-winding AC power of the transformer to be tested is output, the secondary-winding AC power is converted into AC power through the second AC/DC module for connection with the DC output side of the first AC/DC module. The test platform provided by the invention can conveniently adjust voltages, frequencies and currents of the transformer to be tested, is small in loss and is economical and environmental friendly.