Objectives：To acknowledge the patient reported outcomes of total hip arthroplasty 3 months after surgery and analyze the influencing factors. Methods：The cross-sectional study was adopted to select the patients undergoing total hip arthroplasty from May 2016 to October 2016. The “Simplified Chinese version of Hip dysfunction and Osteoarthritis Outcome Score” was used to measure the patient reported outcomes. And then the possible influencing factors，such as individual characteristics were analyzed，for which，the data input was done with Excel，statistical analysis with SPSS 19.0，single factor analysis with t test and multi-factor analysis with multiple linear regression. Results：A total of 326 patients were enrolled in the study and the score of patient reported outcomes was （372.05±54.79） 3 months after surgery. The multiple linear regression analysis found that the influencing factors included the post－operative satisfaction of therapeutic effects（β=58.837，95%CI=54.773 to 61.958，P=0.000），age（β=-0.928，95%CI=-0.992 to -0.575，P=0.000），compliance（β=9.749，95%CI=6.008 to 11.827，P=0.000），postoperative complication（β=-13.968，95%CI=-17.211 to -8.123，P=0.000），the patient reported outcomes score at discharge（β=0.174，95%CI=0.064 to 0.224，P=0.002），unplanned readmission（β=-27.514，95%CI=-37.446 to -17.702，P=0.002），the degree of preoperative pain（β=-1.506，95%CI=-2.368 to -0.639，P=0.034） and preoperative expectations for recovery time（β=1.905，95%CI=1.257 to 3.347，P=0.036）. And the determination coefficient of regression equation was R2=0.661. Conclusion：The high attention should be paid to the patients with severe preoperative pain，older ages，high preoperative expectation，postoperative complication，dissatisfaction with therapeutic effects，unplanned readmission，and the lower patient reported outcomes score at discharge. And the ef－fective intervention for these patients while in hospital and the continued care after discharge should be strengthened.