The invention discloses a composite fungicide containing following four bacterial strains: Epicoccum nigrum, Leptosphaerulina chartarum, Lecanicillium sp. and Peyronellaca pomorum. The fungicide can be used for treating heavy metal pollution of soil. According to the invention, the fungicide is prepared from mycothallus instead of bacteria, and the unit biomass of the fungicide is far higher than that of a bactericide, so that the fungicide is better in adsorption effect; in addition, the fungicide can be cultured in a solid state, and a finished product of the fungicide can be solid particles, so that the fungicide is more convenient to use.