Forward osmosis is rely on the solution's pressure difference,it is low energy consuming and an efficient solution for fruit concentration. This paper introduces the forward osmosis application in tomato juice processing. different levels of sodium chloride( 6% ~ 26%,w / w) as an alternative osmosis agent on tomato juice concentration rate influence was explored at different temperature including ambient temperature. Through a series of comparison,it was observed that the penetration rate was accelerate as the temperature rises; however,when the temperature exceeded a certain value,the penetration rate decreased. Furthermore,with the sodium chloride solution concentration increased,the osmosis rate increased,and concentration time was shortened,the tomato juice was concentrated up to total soluble solids content of 32°Brix at ambient temperature.