Method for recycling trifluoroethylene from production process of tetrafluoroethylene

The invention relates to a method for recycling trifluoroethylene from a production process of tetrafluoroethylene. The method comprises the following steps: enabling a fraction a containing a trace amount of tetrafluoroethylene, trifluoroethylene, monochlorodifluoromethane, hexafluoropropylene and the like to continuously enter a trifluoroethylene crude separation tower to perform rectification separation; and in the process of recycling a trace amount of tetrafluoroethylene at the top of the tower and along with the increment of the content of the trifluoroethylene, discontinuously feeding the fraction containing the trifluoroethylene, the monochlorodifluoromethane, the hexafluoropropylene and the like into a trifluoroethylene rectifying tower to perform rectification purification so asto collect high-purity trifluoroethylene and recycle tower kettle fractions such as the monochlorodifluoromethane and perfluoropropylene. The method is simple in process flow and convenient in operation, the separation effect