Microbial polysaccharides are important sources in food industry. Among the profound variety of polysaccharides some of them are approved by the FDA as food additives and are extensively used in food processing industry. This paper gives a review on some microbial polysaccharides that are most commonly used such as Xanthan gum, Gellan gum, Dextran and Pullulan. Most of these find their application as stabilize, thickener, emulsifier, texturizer and as gelling agents. The addition of these microbial polysaccharides as food additives enhances the overall food quality.