To achieve ultrasonic velocity control of TC4 alloy bars, the effects of rolling and heat treatment (including solution aging heat treatment and triple heat treatment) on the ultrasonic velocity of TC4 alloy bars were studied. The results showed that rolling temperature and deformation degree had a significant impact on the ultrasonic velocity of the bars. With the decrease of rolling temperature and the increase of rolling degree, the ultrasonic velocity decreases gradually.The heat treatment temperature and cooling method also have a certain impact on the ultrasonic velocity of the bars. With the increase of solution temperature and the decrease of aging temperature, the ultrasonic velocity increases gradually. Compared with solution and aging heat treatment, the ultrasonic velocity after triple heat treatment is higher, and the final ultrasonic velocity of the bars cooled by water quenching after the first heat treatment is higher than that of the bars cooled by air.