The property and reaction mechanism of the photoresist was introduced. The mastering model is then built on that base we discuss the effect of exposure and develop and simulate the formation of the recording mask. The energy distribution of mastering laser is emphasized because of its effect on the different period recording mask. In our experiments,we take the Shipley AZ-1350 photoresist and developer as examples in the production of dvd read-only disk mastering,which matches the simulation.