The present invention discloses an electrical workbench with a standby power supply. The workbench comprises an electrical test bed, a main power interface, a standby power supply and a power supply switching device; the main power interface and the standby power supply are connected with the power supply port of the test bed through a power supply switching device; and the standby power supply includes a storage battery, a capacitor filtering circuit, a high-frequency full-bridge inversion circuit, a high-frequency transformer, a rectifying circuit, a capacitor filtering circuit, a power frequency full-bridge inversion circuit and an LC filtering circuit which are connected in order. After a main power supply is interrupted, the standby power supply is automatically come into use, and after the main power supply is recovered, the main power supply recovers power supply, and therefore, the device damaging and data loss caused by sudden loss of power can be effectively avoided, the experiment efficiency is improved, and the service life of the device is prolonged.