Abstract: The temperature in cowshed was drop down by adopting physieal measure, to insure cow's heath in summer and promote milk performance. 10 cows of stable milk performance were rardomly divided into two groups. For lower temperature, electric fans and water-pouring instruments were installed in cowshed. The results indicuted: compared wich CK, the temperature decreased by 10%,12% and 9.2% respectively. Through test, the humidity decreased by 0.33%, that of CK decreased by 0.16%, but hadn’t asigmficant difference(P>0.05).The results indicated: physical drop in temperature benefited improving dairy cow performance.

Key words: dairy cow; performance; high temperature in summer; physical drop in temperature mini-nutritious compound