A new type of inclusions, cumulus-quenched rock inclusions,was discovered in the Jiguanshan pluton of Tong ling,Anhui Province.Being a kind of cumulus rock with fine-grained texture,the inclusions consist approxima- tely of 80% pyroxene,8%apatite,4% magnetite and 8% groundmass. The groundmass,noted for the domination of plagioclase and fine-grained texture,is merely present among some pyroxene grains and grades into a quenched rim towards the edge of an inclusion. This rim was formed by quenching when a pyroxene inclusion was broken and brought to the shallow place after the cumulation of pyroxene but before the crystallization of inte- rgranular melt.The inclusions are consistent with the host rocks in pyroxene composition and initial Nd and Sr isotopic ratios,suggesting that they are cognate inclusions.