Shock sensitivities of 3,4-dinitrofurazanfuroxan(DNTF),2,4-dinitroanisole(DNAN),different proportion of DNTF and DNAN co-melt explosive were studied by shock sensitivity test, IR spectrum,X-ray diffraction and scan electron microscope methods. From the changing law of IR spectra, interplanar spacing, crystal form, the mechanism of shock sensitivity of DNTF reduced by DNAN was discussed. Results show that DNAN can decrease the shock sensitivity of DNTF. The DNTF/DNAN 80/20 co-melt explosive has good integrated performance between sensitivity to shock and crystal structure.