The invention belongs to the field of complex fiber fabric processing and particularly relates to a cloth cutting method for complex fiber fabrics. The method specifically comprises the steps that distribution design is conducted on multiple shapes of pieces to be cut in a complementary way, distribution design results are imported into a cutting machine control system; the control system segmentsthe distribution design, wherein each segment can be completely covered by the cutting range of a cutting machine in the cutting process, and it is ensured that only one row of pieces exists in eachsegment in the fabric conveying direction; positioning points of the segments are determined and need to coincide with the central line of the cutting range of the cutting machine; the control systemcontrols a device to operate and achieves fabric positioning in the conveying process in the mode that the positioning points coincide with the central line, and cutting is performed by using the distribution design of each segment as a motion trail after positioning is completed. By adopting the fabric cutting and fetching method, automatic fabric cutting and taking can be achieved, the working efficiency is effectively improved, and the labor cost is reduced.