Abstract: Continuous triangle waveform as the magnetic field current of scanning magnet can give good uniformity degree of radiation in industrial radiation accelerator. This paper introduced the design of a scanning magnet power-supply used in a 10 MeV industrial radiation accelerator. The scanning magnet powersupply can produce continuous triangle waveform current. The frequency can be adjusted by step length of 1 Hz ranged from 20 Hz to 50 Hz, and the peak-to-peak current is 20 A. The principle of triangle waveform modulator, linear degree of triangle waveform, control system based on singlechip and it's antijamming measure in industrial circumstance are presented. Both theoretical analysis and result of application show that linear degree of scanning and uniformity degree radiation of th