Ｏｂｊｅｃｔｉｖｅ　To observe the efficacy of ultrasound-guided continuous fascia iliaca compartment block (CFICB) for postoperative analgesia and function recovery in elderly patients undergoing total hip arthroplasty(THA).　Methods　Sixty elderly patients undergoing elective THA were enrolled under general anesthesia. The patients were randomly divided into two groups (n=30): group CFICB and group control. Patients in group CFICB received CFICB by ultrasound at 30 min before anesthesia and received CFICB for postoperative analgesia while the group control was provided with patient-controlled intravenous analgesia. Postoperative pain at rest and movement were evaluated. The postoperative requirement of remedy analgesics, muscle strength score at 24 h and 48 h postoperatively, the incidence of adverse effect, satisfaction at 48 h after surgery, Harris hip joint score, time to first walk and duration of hospital stay were recorded.　Results　The VAS at rest and movement was improved significantly in group CFICB when compared with group control (P<0.05). There were 3(10.0%) patients in group CFICB and 16(53.3%) patients in group control were given dezocine, the difference between the two groups was statistically significant (P<0.05). There was no significant difference in limb muscle strength between the two groups after operation (P>0.05). The incidence of postoperative nausea and vomiting was 6.7% in group CFICB and 50.0% in group control (P<0.05) respectively. The postoperative satisfaction of group CFICB was 90.0%, which was higher than that of group control (63.3%, P<0.05). Harris hip joint score in group CFICB was higher than that score in group control (P<0.05). No significant difference in day of first walk and duration of hospital stay was detected (P>0.05).　Conclusions　Ultrasound-guided CFICB can effectively provide good analgesia for THA patients, reduce the amount of general anesthetics and the incidence of adverse events, and promote early rehabilitation exercise. It is deserved to be promoted in clinical application.