It is produced by the strain of Semisynthetic first generation cephalosporin for injection. The activity of Cefazolin to gram-positive bacteria was similar to Cefazolin and Cefazolin, but the activity of gram-negative bacteria was slightly stronger. After intramuscular injection, blood drug concentration increased (blood peak concentration is equivalent to 3-4 times of cefthiophene), and serum elimination half-life was 1.8h, mainly discharged in urine. It may also be used before and during certain surgeries to help prevent infection.