This study used the Assessment of SpondyloArthritis International Society response rate 20/40/70 (ASAS 20/40/70), Bath Ankylosing Spondylitis Disease Activity Index 20/50/70 (BASDAI 20/50/70), Ankylosing Spondylitis Disease Activity Score on the basis of C-reactive protein level (ASDAS-CRP), Bath Ankylosing Spondylitis Functional Index (BASFI), Bath Ankylosing Spondylitis Metrology Index (BASMI), and other indices to measure the efficacy of Kunxian capsules in the treatment of AS patients. Here, CRP is linked to ankylosing spondylitis.