Conversion of PH3 and H2S and simultaneous removal of dust by corona discharge were studied in a wire-cylinder corona discharge reactor. Under the corona discharge, the removal efficiencies of PH3, H2S, and dust reached 99.5, 99.0, and 99.9%, respectively. The results of this study indicated that high conversion of PH3 and H2S was achieved under high SIE, (specific input energy). The required SIE for PH3 was lower than that for H2S to achieve the same conversion efficiency, partially because the chemical bond energy of PH3 is lower than that of H2S. Low content of O-2 was favorable for removing PH3 and H2S due to the energy consumption of O-2 in the electric field. PH3 was converted to elemental phosphorus, H-2, and H3PO4, and H2S was converted to elemental sulfur, H-2, and SO2 or SO42- when PH3 only or H2S only gas was treated with corona discharge under very low O-2 content condition (0.1 vol %). The gas mixture of PH3 and H2S under low O-2 content condition generated H-2, H3PO4, P4S10, elemental sulfur, and SO2 or SO42-. However, H-2, elemental phosphorus, or elemental sulfur was not generated when the O-2 content was more than 0.1 vol %. Moreover, this study demonstrated that dust had a positive effect on H2S conversion but inhibited the generation of SO2. The conversion of PH3 and H2S proceeded through the cleavage of chemical bonds by electron collision with the corona discharge, in which the distribution of products depended on the species of coexisting gases.