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Pd-Rh/CeO2/Al2O3 three-way catalysts by sol-gel method were investigated by catalytic performance test for simultaneous removals NOx and PAHs. The experiments were carried out in a laboratory scale incineration system equipped with a catalyst reactor. The catalysts were characterized with BET, SEM, and XRD. The sol-gel way prepared carrier CeO2/Al2O3, characterization results showed that, CeO2/Al2O3 the specific surface area is 207m2/g, average pore size is 88.76 Å, pores volume is 0.67 cm3/g. In addition to surface roughness, the surface also appeared in many small crystal particles, suggesting that these small crystals may be Pd crystals. Experimental results showed that the removal efficiency of NOx, and PAHs in Pd-Rh/CeO2/Al2O3 TWC was generally greater than 80%. The bimetallic catalyst with a Pd/Rh ratio of 1/0.10 was found to have a best activity for highest removal efficiency.