It is described on kinetics of kerogen transformation in closed system by means of heating simulation in laboratory. The kinetic parameters for transformation of kerogen, including Types Ⅰ,Ⅱand Ⅲ, and their organic carbon, hydrogen and nitrogen,were determined. Using commercial available Kinetics software,the obtained kinetic parameters were applied to calculate recovery coefficients of organic carbon abundance,atomic H/C and N/C ratios in kerogens. The result shows that at the range of Ro from 0.20, to 4.45,, the recovery coefficients of organic carbon, total amount of carbon, hydrogen and nitrogen,atomic of H/C and N/C ratios for Type Ⅰkerogen are respectively from 1.00 to 1.12, from 1.00 to 1.16 , from 1.00 to 4.93, and from 1.00 to 1.24; while the coefficients for Type Ⅱ kerogen are respectively from 0.96 to 1.01 , from 1 to 1.11, from 1 to 4.98, and from 1 to 1.39; and the coefficients for Type Ⅲ kerogen are respectively from 0.62 to 1.00， from 0.88 to 1.00， from 1.00 to 1.51， and from 1.00 to 1.50. In term of above dada， it is concluded that abundance of residual organic carbon must be recovered when the potential of hydrocarbon generation are estimated at high or over mature stage for Types Ⅰ and Ⅲ kerogen while the abundance of residual organic carbon is unnecessary to be recovered for Type Ⅱ kerogen. Atomic H/C ratio needs to be recovered for all types of kerogen. These kinetic data provided are useful to calculate the amount of original organic matter， organic carbon， hydrogen and nitrogen in source rocks at closed system in sedimentary basins.