Abstract: The macrokinetic experiments of olefin hydrogenation in pyrolysis gasoline over an industrial CoMo/Al2O3 catalyst were carried out in an integral tubular fixedbed reactor under the following conditions: 2.0MPa~4.0MPa, 524K~644K, H2/pyrolysisgasoline molar ratio 1.5~3.5 and the partial pressure at reactor inlet for cyclopentene, 3ethyl1pentene, styrene and 1hexene 0.87kPa~5.60kPa, 1.09kPa~7.01kPa, 1.14kPa~7.35kPa and 0.25kPa~0.97kPa, respectively. By means of Powell optimal method and Merson integral method, the powerlaw type macrokinetic models of catalytic hydrogenation of olefin in pyrolysis gasoline were developed, and a good agreement with experimental data and those calculated by the kinetic models estimated was obtained. The reaction orders of cyclopentene, 1hexene, styrene and 3ethyl1pentene were 1.725, 0.685, 0.7 and 0.655, respectively. And the activation energies of hydrogenation reaction of theirs were 63455J·mol－1, 61781J·mol－1, 52105J·mol－1 and 54181J·mol－1, respectively. The CoMo/Al2O3 catalyst here shows a good catalytic activity for 1hexene hydrogenation, a better activity for the hydrogenation of cyclopentene, 3ethyl1pentene and styrene, but a poor activity for 1heptene hydrogenation. The favorable operating pressure is about 3.5MPa for this catalyst.