本文对西门子系列可编程序控制器应用于中药生产的设计思想作了介绍，并阐述了一种新型全自动恒温恒压中药滴丸机的设计与研究。全自动滴丸机采用西门子PLC 全程控制，现场应用情况表明，该PLC 控制系统工作可靠，操作方便。【关键词】中药；西门子PLC；恒温；恒压【Abstract】This article mainly introduces the design thought of Siemens PLC applying for the production of traditional Chinese medicine. In addition, the design and investigation on constant temperature and pressure of a new automatic traditional Chinese medicine dripping machine is introduced in this paper also. The automatic traditional Chinese medicine dripping machine is wholly controlled by the Siemens PLC. Recent application on spots shows: this PLC controlling system works reliably, operates conveniently.【Key words 】traditional Chinese medicine; Siemens PLC; constant pressure; constanttemperature