The invention provides a processing method of a barrier cooking type packaging film. The problem that the prior art is fussy in process is solved. The processing method comprises the following steps of: A, preparing the material; B, sizing and compounding; C, curing; and D, manufacturing the finished product. The processing method provided by the invention is simple and convenient, and the barrier property of the prepared cooking type packaging film is comparable with the composite film of KPA and VMCPP (vacuum aluminizing casting polypropylene) material, and the barrier cooking type packaging film is high in practical value.