In order to comprehensively solve the structural topology ptimization problem considering the self-weight influences and buckling constraints,a new topology optimization design method was proposed.First,for the problems of pseudo-buckling modes and parasitic effects caused by self-weight of low-density areas during the optimization process, and aiming to reduce the calculation,an improved material penalty model was proposed,and measures for identifying and deleting pseudo-buckling modes were introduced.Then,in order to overcome the stress stiffening problem of the conventional stress elements,the mixed stress element was used to accurately evaluate the structural stress.Based on the density filtering and Heaviside three-field mapping scheme,a topology optimization model satisfying buckling constraints and volume active constraints was established, whose object function was that the structural compliance considering self-weight influences was minimal.The adjoint variable method was used to derive the sensitivity of the buckling constraints,and the method of moving asymptotes(MMA) algorithm was adopted to optimize the model.Finally,examples were given to illustrate the correctness and feasibility of the method proposed in this study.