Process for flattening post treatment of electronic grade glass fiber cloth

The invention discloses a process for flattening post treatment of electronic grade glass fiber cloth, and aims to provide a process for flattening post treatment of the electronic grade glass fiber cloth which has good resin impregnation property, good water resistance, good surface slickness and low air permeability. The process comprises the following steps: obtaining an un-desized glass fiber cloth after being woven by a jet loom, washing and soaking the cloth by a water washing device of which the water temperature is between 50 and 90 DEG C, performing flattening processing and shaping on the cloth by a cooling impression roller of which the pressure is between 10 and 70 kg/cm and the cooling water temperature is between 5 and 25 DEG C, coiling the un-desized glass fiber cloth after the flattening processing and shaping by an iron core and performing heat desizing treatment by a heat desizing furnace directly to obtain flattened glass fiber cloth of which the organic residue quantity is less than 0.04 p