Abstract: Based on the analysis of the National Business password the SM3 hash algorithm,a four-to-one architecture is proposed.The architecture uses carry-save adder and loop unrolling to improve its performance.Compared with single cycle architecture,the four-to-one architecture reduces the number of clock cycles by 75% and improves the throughput by 29.4%.In SMIC's 65 nm process,the throughput of SM3 has achieved a high performance of 4Gbps at 125 MHz.This SM3 hash algorithm chip is being taped.It supports byte padding and has pause function.