Abstract: The upper part of the steel-concrete composite wind power tower is a pure steel column, and the bottom of it is a concrete tower. Due to its significant mass and strength changes in the longitudinal direction, the seismic response of this tower structure is significantly different from the original pure steel tower. To study the seismic performance of this kind of structure at different sites, the finite element software is used to build a refined numerical model of the existing 140 m steel concrete composite tower,and the mountain and plain Seismic wave are selected to conduct nonlinear time history analysis of the steel concrete composite tower. The analysis results indicate that the acceleration values of each section of the tower during mountain earthquakes are greater than those during plain earthquakes, and the response of the upper and middle parts of the steel section is also higher than that of plain earthquakes, which is more likely to cause damage and destruction to the combined tower.