The invention relates to a device for producing a BC (bacterial cellulose) composite. The device comprises a culture medium container, rolling shafts, a framework material, a feeding drum, a collecting drum, a guide roll and a press roll, wherein two rows of the rolling shafts are arranged in the culture medium container in parallel, the rolling shafts in each row are spaced in parallel, the rolling shafts in the two rows are staggered in parallel, and the framework material enters the culture medium container firstly through feeding by the feeding drum and guide by the guide roll, then is wound in a staggered manner along two rows of the rolling shafts and conveyed in the culture medium container in an S-shaped track through rolling by the rolling shafts and finally is pulled out of the culture medium container to penetrate through the press roll and be guided into the collecting drum to be wound and collected. Efficient, continuous and large-scale production of the BC composite is realized, the product composite quality is improved, bacterial breeding of a culture medium is accelerated, and the utilization efficiency of the culture medium is improved.