推导出了高阶贝塞耳光束通过有光阑近轴ABCD光学系统传输的解析公式，用以研究了高阶贝塞耳光束被光阑衍射位相奇点的演化特性.结果表明:高阶贝塞耳光束经光阑系统衍射后，中心光涡旋始终存在，拓扑电荷守恒，但涡旋核大小会随光阑半径、传输距离和光束阶数而变化;随光阑半径和传输距离变化，圆刃型位错会消失或产生.

The analytical expression for the propagation of higher-order Bessel beams through an aperture paraxial optical ABCD system was derived,which was used to study the evolution of phase singularities of a higher-order Bessel beam diffracted by an aperture.It shows that there always exists an optical vortex at the center of the diffracted higher-order Bessel beams and the topological change is conserved during the propagation,but the size of the vortex core varies with the aperture radius,propagation distance and beam number.Depending on the aperture radius and propagation distance,the circular edge dislocations may vanish or appear.