Objective: To investigate the bioactivity finger print of Qingkailing Injection on staphylococcus aureus, and to search new method for evaluating bioactivity of Qingkailing Injection.

The first method adopts dynamic threshold to detect the threads of finger-print, and gives the bilevel image directly.

The invention provides a quality control method for Xingdan injection. The method comprises a finger print test of the Xingdan injection;