To provide a method for treating halogen-containing resin, with which by using a solvent in a supercritical state, a useful solid hydrocarbon is obtained in a high yield and generation of gas having high corrosiveness is suppressed, and treatment facilities therefor.

This method for treating halogen-containing resin comprises treatment in the presence of a basic substance in a solvent containing at least an alcohol in a supercritical state. The treatment facilities therefor are provided.