Objective:This study aims to observe the clinical effect of wenshenhuayu manipulation in treating chronic lumbar muscle strain. And reveals the mechanism of wenshenhuayu manipulation of treating chronic lumbar muscle strain. Method:60 patients, who suffered from chronic lumbar muscle strain,were divided into two groups at random,30 in the treatment group and 30 in the control group, The single blind method was applied. The treatment group were treated once a day,20min once,10days as a therapeutic cycle,toti...