The invention discloses a disinfectant component containing the effective ingredient of metiram. The disinfectant component comprises active ingredient component A and active ingredient component B; wherein, the active ingredient component A is the effective ingredient of the metiram, and the active ingredient component B comprises at least one of the following disinfectants: thiophanate-methyl, carbendazim, myclobutanil, difenoconazole, propiconazole, tebuconazole, hexaconazole, polyoxin or benomyl; according to the mass rate, the weight proportion of the active ingredient component A and the active ingredient component B is 50 : 1 to 1:50. The invention is characterized in that the binary sterilizing component can be used to prevent eyespot and anthracnose which are difficult to be prevented in agriculture, and to prevent the disease damages such as leaf spotted disease on fruit trees, and the prevention effect is respectively 87.9 percent, 89.4 percent, 90.5 percent, 92.3 percent, 93.8 percent, 89.7 percent, 90.6 percent, and 91.2 percent.