The present invention discloses a method for repairing soil contaminated by heavy metal by utilizing plant. Said method is characterized by that in the soil contaminated by heavy metal the maize can be planted, before harvest at least two additives selected from editic acid or its sodium salt or its potassium salt (EDTA), nitrilotriacetic acid or its sodium salt or its potassium salt (NTA) and citric aid or its sodium salt or its potassium salt (CA) can be applied, and then the aerial part of maize can be harvested so as to attain the goal of repairing soil contaminated by heavy metal.