The use of mulch has brought great convenience to agricultural development, but at the same time, it can cause extremely serious white pollution, and there is a lack of relevant degradation treatment research. Low-temperature plasma degradation is a highly efficient and green treatment technology that degrades pollutants by generating high-energy electrons and active substances in the reaction space. Firstly, a high frequency AC needle plate corona discharge structure is used to optimize the design for the electrode structure. Then low-temperature plasma degradation technology was used to compare the effect of different discharge power, air humidity, needle film spacing, and discharge spacing on the degradation of the mulch. The results showed that the shape and distance of the needle tip would affect the electron density and electric field intensity to different degrees, and when the slope of the needle tip was 3.33 and the spacing between the needles was 12 mm, the electron density and electric field intensity were the largest, which were 1.55×1013m-3 and 1.2×106V/m, respectively; the increase of the discharge power would lead to the increase of the energy density in the space, thus increasing the energetic particles in the space The degradation efficiency of the film increases from 0.0% to 0.96% with the increase of the input power, but the energy efficiency increases and then decreases with the increase of the input power, in which the best energy efficiency is 34.29 (μg/w-h); the increase of the air humidity not only leads to the change of the discharge form and the appearance of stable micro-discharge, but also affects the content of the active material, leading to the degradation of the film The distance between the ground film and the tip of the needle will also lead to stable micro-discharge, which will increase the degradation efficiency from 0.43% to 1.02%; in addition, the distance between the electrodes of the needle plate will also have an impact on the degradation efficiency, when the distance between the discharge is 15mm can meet both the radiation range and radiation intensity of the plasma, the degradation efficiency and energy efficiency will reach the maximum, which are 2.3% and 68.18 (μg/w-h), respectively.