To address the issues of incomplete amination and difficult removal of acidic impurities in the existing synthetic methods of 4，6-dinitro-5，7-diaminobenzofuroxan （CL-14）， a novel synthetic route for CL-14 was developed. Starting from 1-chloro-3，5-dimethoxybenzene （1）， CL-14 was synthesized via a three-step process involving nitration， azidation/dediazotization， and amination. The effects of molar ratio， reaction temperature， reaction time， and solvent type on the yields of 1-chloro-3，5-dimethoxy-2，4，6-trinitrobenzene （2）， 5，7-dimethoxy-4，6-dinitrobenzofuroxan （3）， and CL-14 were investigated. Meanwhile， CL-14·DMSO single crystals were successfully cultivated by temperature-programmed crystallization. The crystal belongs to the monoclinic system with the P2₁/n space group. The short-pulse shock initiation performance of CL-14 was tested using the Neyer D-optimality method， and the initiation threshold voltage was 1223 V， indicating a favorable shock initiation sensitivity. Under the optimized reaction conditions， the overall yield of CL-14 synthesized from starting material 1 via the three-step route was 45%， with a purity of ≥97%.