On one hand, the invention discloses a heavy metal contaminated soil repair conditioner, which comprises at least one of the following components: sulfur-modified charcoal, attapulgite, zeolite, iron powder and lime substances; and on the other hand, the invention further discloses an application of the heavy metal contaminated soil repair conditioner in repairing of heavy metal contaminated soil. The heavy metal contaminated soil repair conditioner is wide in raw material source, low in cost, simple in preparation and application methods, obvious in repairing effect on soil heavy metal compound pollution, does not cause a risk of secondary pollution, and also has the effects of improving the soil structure and improving the soil fertility. The agriculture-forestry-stockbreeding wastes are taken as one of the main raw materials, so that the problem of treatment is solved and the heavy metal contaminated soil repair conditioner has great popularization and application value.