Abstract: The polypyrrole/attapulgite nanocomposites（PPy/ATP） were fabricated via in chemistry oxidation polymerization of pyrrole（Py）monomer，using sodium dodecylsulphonate and FeCl3·6H2O as dopant and the oxidant，respectively. The as-prepared nanocomposites were characterized by XRD，TG-DTA，FTIR and TEM. With increasing the dosage of Py，the volume resistivity of the nanocomposites decreases gradually. When the mass ratio of Py to ATP≥0.25 the volume resistivity of nanocomposites keeps almost change. XRD and TEM measurements of the nanocomposites revealed that the surface of attapulgite is encapsulated by the amorphous polypyrrole to form a ‘core-shell’ fibrous nanostructure，and the thickness of coating is about 2 nm. Data from TG-DTA revealed that the heat resistance of nanocomposites is higher than pure polypyrrole. According to the spectra of FTIR，it is inferred that the physical interaction exist between polypyrrole and attapulgite.