Objective:To observed primary liver cancer characteristics by using ultrasound technology and evaluate its diagnostic clinical value.Methods:Our hospital 45 cases of confirmed patients with primary liver cancer lesions were taken to ultrasound contrast,observed lesions of the location, number,size,imaging characteristics,and analyzed before and after contrast flow classification and correct rate.Results:All the lesions were seen under ultrasound contrast. The number of lesions was more than conventional ultrasound,and ultrasound contrast the flow classification levels were improved markedly,ultrasound contrast correct rate was higher than that of conventional ultrasound.These differences were statistically significant(P0.05).Conclusion:Ultrasound contrast technology can greatly enhance the liver-cancer diagnosis and differential diagnosis,and provide important reference for the clinical treatment, worthy of promotion.