The working principle and structure of oilair lubrication system applied on the special steel shortstress bar mill were introduced.Trouble shooting and maintenance of the lubrication system on the mill were discussed,the application effects of the oilair lubrication system on the mill were analyzed,and necessity of improvement was proposed.The results show that the effects are good of applying the oilair lubrication on the shortstress bar mill.The phenomenon of burnt bearing caused by poor lubrication is greatly reduced.There is high efficiency of lubrication oil usage,and the rate of oil consumption is only about 1/10 to 1/5 of oilmist lubrication.