Abstract: 【Abstract】0bjective To evaluate the clinical outcome of total hip arthroplasty through a minimally invasion and summarize the surgical experience .Methods thirty cases of THA were performed through minimally invasive anterial surgical approach(MIS group)．Among them，there were 22 males and 8 females，the mean age was 64.2 years and the mean BMI was 23.4kg／m2 and the mean Harris score was 31.9．For comparison，another 30 cases of THA were performed through a standard posterolateral approach at the same period(standard group)．the mean age，BMI and Harris score were similar to the MIS group．Operation time，blood loss，incision length，complication，postoperative VAS pain score，postoperative hospitalization，functional recovery were analysed and compared between the above two groups．Results These patients were followed up for average one year，no infection，fracture and neurovascular injury occurred in both groups．There were one skin late healed 、four deep venous thrombosis and three dislocation in standard group．There were big significant differences regarding operation time and incision length in the two groups．There were significant differences regarding the complications，postoperative VAS pain score，postoperative hospitalization，functional recovery of one month and six months, but there were no significant differences regarding the functional recovery of one year after operation． Conclusion THA through a minimally invasive anterial surgical approach is an effective and reproducible operative technique．The advantages of MIS THA includes less postoperative pain，shorter post-operative hospitalization and faster rehabilitation．．But the selection of suitable patients for mini-incision THA should be noticed.

Key words: Arthroplasty, replacement, hip, Minimally invasive, Follow-up studies