Here we report the study of the photodissociation dynamics of carbonyl sulfide in the vacuum ultraviolet region using the time-sliced velocity map ion imaging technique.Images of S(3PJ=2,1,0),S(1D2) and S(1S0) products were measured at four photolysis wavelengths of 129.32,128.14,126.99,and 126.08 nm,respectively.Four main dissociation channels:S(3PJ=2,1,0)+CO(X1Σ+),S(3PJ=2,1,0)+CO(A3Π),S(1D2)+CO(X1Σ+) and S(1S0)+CO(X1Σ+) channels,have been clearly observed and identified.Vibrational states of the CO co-products were partially resolved in the experimental images.From these images,the product total kinetic energy releases,the branching ratios and angular distributions of products have been derived.While the S(3PJ=2,1,0)+CO(A3Π) product channel is formed through the adiabatic dissociation process after the excitation to the (31Σ+) excited state,the results suggest that strong nonadiabatic coupling plays an important role in the formation of other three channels.