在文献[1]中我们根据砖烟囱的震害证明了水平地震力起决定性作用的传统观点是错误的,实际上是竖向地震力在起主要作用。同时还阐述了砖烟囱出现多条裂缝的破坏机理。本文在文献[1]的基础上对烟囱出现斜缝、错位及破坏截面接近顶端等现象,计算其最大水平地震力及最小竖向地震力以证明上述观点.对出现的多条裂缝,也用计算数字来说明其破坏机理. In the literature [1], we proved that the traditional view that horizontal seismic force plays a decisive role based on the earthquake damage of brick chimneys is wrong. In fact, vertical seismic force plays a major role. At the same time, it also expounds the failure mechanism of multiple cracks in the brick chimney. This paper is based on the literature [1] on the chimney appears oblique seam, dislocation and destruction of the section close to the top and so on, to calculate the maximum horizontal seismic force and minimum vertical seismic force to prove the above point of view. Calculate the number to illustrate the destruction mechanism.