The Mesozoic intermediate--acid intrusive rocks in Tongling area have within them lots of cognate inclusions, with rocks of calc-alkaline series containing shallow-source inclusions(particulate dioritic ones)whereas those of alkaline series containing deep-source inclusions(pyroxinite and hornblendite ones). These inclusions are similar. to their host rocks in mineral chemistry and geochemistry of rare earth elements and trace elements but somewhat different from them in physical-chemical conditions for their formation and magmatic dynamic features.This suggests that they are comagmatic. products. formed under different condi-tions, that is, the shallow-seated inclusions came from the chilled border of the upper magmatic chamber while the deep-seated inclusions from the accumulative rocks of the lower magmatic chamber.