本文在空气动力学分析的基础上，利用弹丸飞行弹道空气动力信息作动力源，对小孔气动延时工作原理、具体结构和理论建模进行了初步探讨与研究。实例计算表明，有良好的延期效果。为微旋或无旋弹丸引信延期解除保险机构的设计，提供了一种新方法、新途径。 Based on the aerodynamic analysis, this paper makes use of the aerodynamic information of projectile flight trajectory as the power source, and makes a preliminary discussion and research on the working principle, concrete structure and theoretical modeling of small-hole aerodynamic delay. Example calculation shows that there is a good delay effect. It provides a new method and new way for deferring the design of the insurance agency for the spin-down or non-rotating projectile fuze.