In the present paper, the magnetic sasceptibility (m. s.) of red earths, lateritic red earths, latosols, young calcareous soils and paddy sails in subtrapie aad tropic China is reported.. The m. s. is greatly influenced by parent rocks. The m. s. values of red earths and latosols derived from basalt and andesite amount to 300-500 units and even Up to 2000-6000 units (10^-6 emn/g).Those of red earths and latoeols on granite and ether acid magmatic rocks amount to 40-100 units, and those of red earths and latosols on limestone, shale, sandstone and tuff amonat only to 10-40 units mostly.