Control device for internal combustion engine

When urea aqueous solution is frozen (YES in S104), a process (S108 to S114) of decreasing an exhaust gas temperature in an exhaust passage (26) as compared to the exhaust gas temperature when urea aqueous solution is not frozen (NO in S104, S120, S122) is executed. An exhaust gas temperature decreasing process is executed by decreasing a regeneration temperature in a PM regeneration process at a DPF catalyst (32). Therefore, it is possible to suppress a rise in the temperature of exhaust gas due to the PM regeneration process, so it is possible to suppress an overheat of an urea aqueous solution addition valve (230) that cannot be cooled due to freezing of urea aqueous solution.