Objective To analyze the changes of erythrocyte sedimentation rate (ESR) ,C‐reactive protein (CRP) and serum am‐yloid A (SAA) before and after total hip arthroplasty(THA) .Methods A total of 124 cases of unilateral THA in our hospital from April 2012 to April 2015 were selected as the research subjects .The CRP ,ESR and SAA levels were detected before operation and on postoperative 1 ,3 ,5 ,7 ,14 d ,and 1 ,3 months .The differences of above indexes between the patients with postoperative deep venous thrombosis (DVT ) obstruction and the patients with normal recovery were retrospectively analyzed .Results CRP was sharply increased after operation and reached the peak value on 3 d ,then rapidly faded away ,and recovered to the preoperative level at postoperative 1 month;ESR was continuously elevated until reaching the peak value ,then slowly declined ,and recovered to the normal level at postoperative 3 months;SAA was sharply elevated after operation ,reached the peak value on 3 d ,then slowly de‐clined and could recovered to the normal level at postoperative 3 months .The CRP ,ESR and SAA levels in the patients with post‐operative complications occurrence were significantly higher than those in the patients with postoperative normal recover at the same time ,moreover which could not recover to the preoperative levels .Conclusion Dynamically monitoring CRP ,ERS and SAA after THA could conduce to early discover postoperative lower limbs DVT blockage complication .