In order to study the failure mechanism and mechanical behavior of the concrete filled steel tubular lattice for wind power generation plane tower under earthquake action, the low cycle test was carried out on three planar towers, and its hysteresis curve, skeleton curve and stiffness degradation were analyzed. The curve was analyzed and the test was verified by ABAQUS finite element software and the parameter expansion analysis of tube diameter ratio and wall thickness ratio was carried out. The results show that the failure modes of TJ 1 and TJ 3 are strength failure, and the failure mode of TJ 2 is instability failure; the area of hysteresis curve of the specimen with higher tube diameter ratio and wall thickness is larger and energy consumption is large; Increasing the wall thickness ratio can effectively improve the bearing capacity and initial stiffness of the specimen and slow down the stiffness degradation rate of the specimen. According to the ABAQUS analysis, when the pipe diameter ratio b≤042 or the wall thickness ratio t≤125, the yield displacement, peak load and ultimate displacement increase faster, and the pipe diameter ratio b>042 or the wall thickness ratio t>125 the increase is less.