Method for improving phytoremediation efficiency of heavy metal hyperaccumulation by using spraying agent

The invention relates to the technical field of soil remediation, in particular to a method for improving the phytoremediation efficiency of heavy metal hyperaccumulation by using a spraying agent. The spraying agent is prepared from 25 mg*L of heteroauxin and 20 mg*L of kinetin, firstly, the spraying agent is cooperatively irrigated to plant leaves and soil around rhizosphere, and then the spraying agent is applied on the leaf surface every time after harvesting. The method for improving the phytoremediation efficiency of the heavy metal hyperaccumulation by using the spraying agent has the advantages that the investment and maintenance cost is low, the method is environmentally friendly, and can be widely used in the remediation of soil containing higher heavy metal, the cultivation use of subsequent soil is not affected, the phytoremediation efficiency is improved, the effect is quick, for medium-and-low pollution soil, the heavy metal pollution can be reduced to an ideal state through only several