In order to solve the instability of MAPBI3 in perovskite solar cells and improve the performance of the cells,TiO2 nanorod array was used as electron transport layer and Sb2S3:P3HT blend was used as modification layer of perovskite MAPbI3. Firstly,Sb2S3 nanospheres with appropriate size were prepared by solvothermal method,in which SbCl3 and Na2S2O3 were used as antimony and sulfur sources. Secondly,Sb2S3 and P3HT were mixed in chlorobenzene solution by ultrasonic dispersion method to obtain Sb2S3:P3HT blend,which was coated on TiO2 nanorod array deposited with MAPbI3 thin film to form FTO/TiO2NR/MAPbI3/Sb2S3:P3HT composite film,and Sb2S3:P3HT blend modified TiO2 nanorods array MAPbI3 solar cell was fabricated.Finally,the solar cell was characterized and tested with SEM,XRD,J-V curves and uv-vis absorption spectroscopy.The results show that the maximum power conversion efficiency (PCE) for the FTO/TiO2NR/MAPbI3/Sb2S3:P3HT/Spiro-OMeTAD/Ag solar cell is 14.73%.Compared with the PCE of TiO2 nanorod array MAPbI3 solar cell without Sb2S3:P3HT blend modification,the power conversion efficiency of the Sb2S3:P3HT blend modified solar cell was significantly improved.Therefore,Sb2S3:P3HT blend can efficiently avoid the instability of perovskite MAPbI3 oxidation,which provides a reference for improving the performance of TiO2 nanorod array MAPbI3 solar cell.