Heavy metal contaminated soil remediation agent

The invention discloses a heavy metal contaminated soil remediation agent which comprises the following raw materials: 10-20 parts of zeolite, 30-50 parts of a microbial agent, 3-10 parts of an emulsifier, 1.2-1.3 parts of calcium polysulfide, 0.5-5 parts of sodium sulfate, and the balance of an aqueous solution, wherein the emulsifier is a mixture of medium-chain triglyceride and an aqueous solution, the mobility of the heavy metal is determined by the existence form of the heavy metal in the soil, large holes and pore channels exist in the structure of the zeolite, the mobility of the heavy metal in the soil is reduced by the zeolite through ion exchange adsorption, the mobility of the heavy metal is reduced through the adsorption effect of zeolite on the heavy metal, after the heavy metal in the soil is fixed, and the heavy metal and the zeolite are subjected to ion exchange fixation, so that a stable and good breeding space is favorably provided for the microbial agent, by means of medium chain triglyceri