The invention discloses a flame heating curing technique for coating solidified solventless epoxy paint in the construction of coating the solventless epoxy paint, which relates to the technical field of the piping system and a common technique for coating liquid or other fluids on surfaces. In the technique, a workpiece to be coated is pretreated and qualified, material sheet with antisticking property is adhered and wound on the surface of the workpiece, flame is adopted for heating, and then the antisticking sheet is removed from the surface of the workpiece which is coated with the epoxy paint; after the epoxy paint is coated, the material sheet with antisticking property is again adhered and wound on the surface of the paint, flame is adopted for heating again, after the paint is cured, the adhered and wound material sheet which is antisticking is removed. The invention provides a new flame indirect heating curing technique which only adopts a little antisticking material sheet and a flame generating device to quickly solidify the solventless epoxy paint and to guarantee no coking, flowing and sagging of the solventless epoxy paint. When in construction, the solidification and coating are convenient and economical.