Petroleum hydrocarbon-contaminated soil remediation agent and production and use methods thereof

The invention discloses a petroleum hydrocarbon-contaminated soil remediation agent and production and use methods thereof, and belongs to the technical field of soil remediation. The disclosed protected petroleum hydrocarbon-contaminated soil remediation agent comprises wheat straw bio-char, sepiolite, coal ash and calcium peroxide nano-microcapsules, and by conducting scientific matching by means of properties of the raw materials and by mixing the raw materials for use, the activity and abundance of petroleum hydrocarbon degradation bacteria are promoted, so that petroleum hydrocarbon-contaminated soil of farmland is remedied. By means of the provided soil remediation agent, the content of petroleum hydrocarbon of the soil can be effectively reduced, and the petroleum hydrocarbon is prevented from entering farmland plants fundamentally, so that the provided soil remediation agent has the advantages that the cost is low, operation is simple and convenient, popularization is easy, andthe like. Not only can t