The invention relates to material surface processing by using normal-pressure plasma, in particular to surface processing of sealing rubber. A sealing rubber processing device using an atmosphere normal-pressure jet flow low-temperature plasma technology comprises a cabinet body, an oil-water filtering device, at least one low-temperature plasma jet flow generating module, a touch screen control cabinet and feeding and discharging windows and is characterized in that a material guide roller component is arranged on a low-temperature plasma jet flow spray gun fixing and adjusting device; sealing rubber is arranged in the position, above the material guide roller component, of a pulley; the low-temperature plasma jet flow spray gun fixing and adjusting device comprises at least one low-temperature plasma jet flow spray gun; and all the low-temperature plasma jet flow generating modules are connected with the spray guns correspondingly; the oil-water filtering device, the low-temperature plasma jet flow generating modules, the low-temperature plasma jet flow spray gun fixing and adjusting device and the material guide roller component are connected with the touch screen control cabinet. The sealing rubber processing device is easy and convenient to operate, high in controllability and low in processing cost.