The invention discloses a material modification device based on dielectric barrier discharge plasma. The material modification device comprises a device main body upper part, a device main body lowerpart, a copper plate, a copper screw rod and nano iron powder. The invention also discloses a material modification system based on the dielectric barrier discharge plasma. The invention also discloses a material modification method based on the dielectric barrier discharge plasma. According to the invention, the uniform one-dimensional discharge can be generated, thereby reducing the randomness and dispersity of discharge in spatial distribution, and guaranteeing the uniformity of a large-area material treatment effect. The device, system and method can achieve the matching of discharge gas according to the modification demands of a film material, so as to introduce a specified group on purpose. A film material transmission mechanism is arranged, so the device and system can perform the large-area, uniform and continuous treatment of the material through low-temperature plasmas, and the device and system can be applied to research, teaching and industrial production and popularizationin the aspect of material surface modification.