Plastic film blowing production method

The invention provides a plastic film blowing production method. Each adjustment operation of the plastic film blowing production method comprises the following steps that (1) a distance measuring instrument driving mechanism drives a sensing distance measuring instrument to move around a film bubble at a constant speed along an annular horizontal guide rail for a circle, and the sensing distance measuring instrument continuously measures the horizontal distance x between the sensing distance measuring instrument and the film bubble in the moving process; (2) the horizontal distance s between each point on the circumference of the film bubble and the vertical central axis of an extrusion die head is calculated according to a formula; (3) which point on the circumference of the film bubble has the maximum horizontal distance s with the vertical central axis of the extrusion die head is analyzed; and (4) the extrusion die head and a clamping roller and clamping plate combination body rotate relatively around th