This research was conducted to investigate awareness of feed safety management for total mixed ration (TMR) manufacturer and pollution level of harmful factor in feed. The questionnaire was distributed to 80 TMR manufacturing companies for 10 months and 50 questionnaires were collected. The questionnaire was consisted of 17 questions and the data were analyzed by descriptive statistic analysis, cross relation analysis and reliability. The main perception was imposing the feed safety management system should be followed after building institutional condition for the feed safety management. The most required condition was providing and sharing information on feed safety to establish feed safety management system. According to the research, the most weak point during managing feed safety and harmful factors was the mold toxin. The most hazard factors during feed manufacturing steps were foreign substances such as metal, fragment and soil. Upon investigation on pollution level of feed's hazard factor, cadmium, arsenic and selenium were exceeded standard of permission but ochratoxin, aflatoxin, melamine and Nonprotein nitrogen were not exceeded. Pesticide residual, fumonisin and salmonella were not detected. As the result of the analyses, to construct the feed safety management system of TMR manufacturing company, it is necessary to politically institutionalize the providing and haring information of feed safety. Moreover, reinforcing feed management to get rid of foreign substances and to prevent mold toxin among feed is advised. Lastly, establishing system of eliminating foreign substances at raw materials supplier should be mandatory.