According　to　characteristics　of　vertical　glass　edge　grinding　machine,　such　as　narrow　installation　space　and　foul　working　conditions,　based　on　homemade　strain　type　grinding　dynamometer　and　orthogonal　test,　the　relationships　of　tangential　grinding　force　Fτ　and　radial　grinding　force　Fn　to　grinding　wheel　velocity　vc,　feed　speed　vf　and　chamfer　size　c　were　researched　and　analyzed　when　grinding　glass　edge　through　V-shaped　grinding　wheel,　forecasting　models　of　tangential　and　radial　grinding　forces　were　established.　Result　show　that　tangential　and　radial　grinding　force　increases　with　the　increase　of　chamfer　size　c　and　feed　speed　vf,　tangential　grinding　force　Fτ　decreases　with　the　increase　of　the　grinding　wheel　velocity　vc,　which　has　slight　effect　on　radial　grinding　force　Fn.　Among　grinding　parameters,　chamfer　size　c　has　the　most　significant　effect　on　grinding　force,　the　second　is　feed　speed　vf,　and　the　third　is　grinding　wheel　velocity　vc.　The　average　error　is　less　than　5%　between　values　calculated　by　grinding　force　model　and　actual　measuring　values.