The invention provides a discharge ultraviolet imaging quantization parameter extraction method of high-voltage electric equipment. Firstly, by means of digital image grey level transformation, a threshold division algorithm, a morphological filter algorithm and a small region image elimination algorithm, a discharge region image in an ultraviolet image of the high-voltage electric equipment is segmented, then a boundary point of each region is extracted by means of a multi-region boundary tracking algorithm, and on the basis of the preceding operation, one or more geometrical parameters of a light spot are calculated and used for carrying out quantitative analysis on discharge strength of the high-voltage electric equipment. According to the method, adverse influences of gain of an ultraviolet imager and observation distances on analysis results can be eliminated, quantitative analysis can be carried out on discharge strength of a plurality of discharge points, and accuracy of analysis results is greatly improved. Besides, due to the fact that the parameter comprises position information of the discharge points, and conditions are created for accurate positioning of discharge defects.