As China is the first power of textile printing and dyeing ,the dischargeof printing and dyeing wastewater is very huge .Therefore ,the increasingly serious environmental pollution makes the monitoring of discharge of printing and dyeing wastewater become very important . Through the combination of the developmental situation and characteristics of environmental monitoring technology and the application of online automatic monitoring technology in monitoring indicators which include the printing and dyeing wastewater CODand dye concentration ,the article proposes some suggestions for the existing problems in online automatic monitoring .In addition ,the article also makes some discussions and prospect for the future development direction of environmental monitoring work .%指出了我国作为纺织印染第一大国，印染废水的排放量巨大，日益严峻的环境污染问题使得对印染废水的排放进行监测就显得十分重要。结合环境监测技术自身的发展现状和特点以及在线监测技术在印染废水COD、染料浓度等监测指标上的应用，对在线监测存在的问题提出了一些建议，并对今后环境监测工作的发展方向进行了探讨和展望。
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