The work aims to study the influence of the addition of electromagnetic absorber on photopolymerization kinetics of UV photocuring system. The effects of light intensity, photoinitiator content, type and content of electromagnetic absorbers on photopolymerization kinetics were researched by real-time infrared spectroscopy (RT-IR). The reaction rate of the polymerization system and the final double bond conversion rate were improved with the increase in the light intensity. With the increase in the initiator content, the final double bond conversion rate was improved from 76% to 100%; however, the relative reaction rate would be reduced with excessive initiator content. The final double bond conversion rate of the ink was higher with the oxidized graphene as the electromagnetic absorber. The relative response rate of the ink was higher with Fe3O4 as the electromagnetic absorber. The maximum relative reaction rate was reached within 10 s. When the content of electromagnetic absorber was increased, the final double bond conversion rate would be decreased, and the time for the ink reaction rate to reach the maximum value was subject to no significant influence. Light intensity, content of photoinitiator, type and content of electromagnetic absorber have great influence on the photopolymerization process of UV electromagnetic absorption ink.