The invention discloses an organic field-effect tube of a composite channel, and belongs to the field of microelectronic organic devices. The field effect characteristic of horizontal stacking organic field-effect tubes at the present stage is unsatisfactory, and cannot reach the requirement of modern integrated circuit technology. According to the organic field-effect tube of the composite channel provided by the invention, horizontal and longitudinal stacking composite active layers are formed by adopting photolithography and mask method, and the organic field-effect tube consists of a substrate, a gate electrode, a gate dielectric layer, the active layers, source and drain electrodes which are stacked in sequence. According to the structure, the interface amount of N-type active layers and P-type active layers is increased, the amount of current carriers generated through exciton dissociation is increased, and thus the field effect characteristic of the organic field-effect tube is improved. The organic field-effect tube of the composite channel can provide a novel idea for preparing the organic field-effect tube with good field effect characteristic, and has an important influence on commercialization application of the organic field-effect tube.