气动包装机已在国内外广泛推广使用， 因为气动包装是有高速无污染机构， 简单成本低廉等优点，但在包装过程中如何实现准确快速定位，实现精确送料、封口、计量、打印等动作，要求机械控制系统重复精度要高。应用本系统原理设计的各类气动包装机械，不但可以实现计算机全自动化控制，而且具有非常好的使用性能，本文研究重点推出了应用“ＰＣＭ”控制的廉价气动控制新途径。 Pneumatic packaging machine has been widely used at home and abroad, because the pneumatic packaging is a high-speed non-polluting institutions, simple and inexpensive advantages, but in the packaging process how to achieve accurate and rapid positioning, accurate feeding, sealing, metering, printing and other actions, Requirements of mechanical control system to repeat the high precision. The pneumatic packaging machinery designed by using the principle of the system not only can realize full automatic control of the computer but also has very good performance. This paper focuses on the introduction of a new inexpensive pneumatic control method using “PCM” control.