Bell brings with him a wealth of top-flight experience after spells at Harlequins and Leeds, winning a Powergen Cup final with the latter in 2005.
Bell has represented England from Under-16 level up to the Saxons and brings a powerful running option to the Wasps midfield. The 28-year old has featured 18 times for Sale Sharks this season.
Bell’s signature comes on the back of news that Nicky Robinson and Ryan Davies are also joining the Wasps backline next season.
London Wasps Chief Executive Chris Thomas said: We’re delighted to be making another strong addition to our squad. We have a mix of both young and experienced players right across our backline and Chris is a player we believe will offer us even greater options in our midfield.”
Bell will join London Wasps for the 2011/12 season.