Based on an analysis of the principle of LED luminosity, and an understanding of the the basic requirements of the drive circuit, a highly-efficient and energy-saving LED driving circuit has been proposed with HV9910 as its control chip. With its design based on the circuit scheme of the chip, the components selection is to be determined through a theoretical calculation, followed by a power-on test of the drive circuit. The test results show that under the condition of voltage fluctuation and load change, the load current of the drive circuit is basically stable, guaranteeing a stable work current for the LED operation, and thus meeting the basic requirements with its simple circuit structure, professional design, and high reliability in the newly designed driving circuit.