The atmospheric jet plasma surface treatment machine consists of a plasma generator and a plasma spray gun. The atmospheric pressure jet plasma has a flexible and changeable electrode structure. It not only has the characteristics of separation of the discharge area and the working area, low gas temperature, and a rich variety of active particles, but also has obvious advantages such as operability, easy control, no pollution, and no waste when applied to material surface treatment. Through the bombardment and activation of plasma, it can increase the surface adhesion while removing dirt. Compared with vacuum plasma, it also has the following advantages: no vacuum system is required to maintain a low pressure state, it is not limited by the size of the workpiece, the equipment investment is small, and the cost is low; due to its own structural characteristics, it can be handled by handheld mobile processing or combined with a robotic arm for automated processing, suitable for online integration, combined with nozzles of different sizes, it can process deeper gaps and grooves.