Determination method of base membrane production process

The invention provides a method for determining a base membrane production process, and belongs to the technical field of wet-process base membrane manufacturing. The determination method of the base membrane production process comprises the steps of melt extrusion, casting piece forming, longitudinal stretching, first transverse stretching, extraction and second transverse stretching, and further comprises the following steps: taking a first test sample subjected to second transverse stretching, and testing a plurality of air permeability values of the first test sample along the breadth direction, and sequentially comparing the plurality of air permeability values of the first test sample with a standard air permeability value to obtain the range of the air permeability values, and adjusting the treatment temperature of the second transverse stretching or the treatment temperature of the first transverse stretching at the breadth position corresponding to the air permeability values according to the compari