In-situ soil remedying composite material capable of efficiently removing heavy metals

The invention discloses an in-situ soil remedying composite material capable of efficiently removing heavy metals. The in-situ soil remedying composite material comprises the following components: 10-20 parts of sodium persulfate, 5-10 parts of sodium polyepoxysuccinate, 1-5 parts of polyvinylpyrrolidone, 1-3 parts of nanocarbon, 1-5 parts of serpentine, 5-10 parts of lignite humate, 1-3 parts ofa surfactant, 4-8 parts of calcium dioxide, 4-8 parts of Chinese herbal residue, 1-3 parts of potassium permanganate, 1-5 parts of red mud particles, 1-5 parts of chitosan dithiocarbamate and 1-3 parts of methacryloyloxyethyl trimethylammonium chloride. The in-situ soil remedying composite material can remedy soil contaminated by various heavy metals (such as Pb, Cd, Cu, Zn, Cr and As) and toxic organic substances (such as chlorinated organic compounds, brominated organic compounds and antibiotics), reduces conditions of strong heavy metal activity and strong bioavailability in the soil, prevents transfer of the heavy