Abstract: Using finite element software, the strength of a 1.5 MW wind turbine tower is analyzed. Based on the equivalent simplified structure, the tower reserves the major structure, and the dynamics and statics analysis of the first flange section of the tower is carried out. The results show that under the analysis method of calculation proposed in this paper, modal frequencies and analytical results are consistent, and the deviation is 10.47%; it is found that 1.5 MW wind turbine tower can operate safely within the normal speed range. In addition, the safety margin of the simulated door hole, the structure around the door hole, the ventilation frame and its surrounding maximum stress are 54.7%, 46.7%, 30.1% and 9.2% respectively, which all meet the design requirements. The reduction coefficient of the buckling strength at the door of the tower is 0.709. The buckling strength of each section of the tower is further calculated. By comparing the actual loading stress, the ultimate buckling of each section meets the design requirements and the safety standards as well.