The article considers the general synthesis technique of hierarchical tree structures on FPGA/SoC for binary comparators. Designing of first level comparators is given. The best hierarchical comparator structure for the specific FPGA/SoC family is found empirically by experimental researches. The offered method allows reducing an area from 5.3% to 43.0%, and for high bitwidth comparators (with an input word length 1024) by 2.225 times. In the conclusion additional opportunities of the offered method are marked, and main directions of further researches are presented.