The invention relates to an ultrasonic image quantitative evaluation method, which comprises the following steps of: 1, preprocessing an obtained lung ultrasonic image; 2, carrying out image segmentation on the lung ultrasonic image; 3, carrying out quantitative analysis index extraction on the lung ultrasonic image; and 4, carrying out multi-parameter conjoint analysis on the lung ultrasonic image. According to the method, parameters related to the pleura line, the B line and the real lung change are extracted by adopting a method for carrying out quantitative analysis on the ultrasonic image, then a multi-parameter conjoint analysis method is utilized, all quantitative analysis indexes are comprehensively utilized, and finally a lung lesion degree classification result is obtained. Therefore, a non-invasive/quantitative lung ultrasound image quantitative evaluation method is provided for clinic, and the method can be better applied to rapid lesion screening, grading diagnosis and illness follow-up visit of a large range of people and critically ill bedside monitoring.