Various organic groups have been introduced into silicone polymer in order to broaden its application.Amino, epoxy, carboxy, mercapto and alcohol groups in polysiloxane provide reactivity to ambient materials and additional function.Polyether, fluoroalkyl, alkyl, aralkyl, ester and alkoxy groups in polysiloxane provide new valuable properties.Preparation methods and charateristic applications of those organo-modified silicone fluids are reviewed.