Multi-plant combined remediation method for arsenic-containing pesticide and/or pentachlorophenol (PCP) contaminated soil

The invention provides a multi-plant combined remediation method for arsenic-containing pesticide and/or pentachlorophenol (PCP) contaminated soil. Selected plants are pteris vittata, conyza canadensis and clover. The multi-plant combined remediation method comprises the following steps that the soil pH value is detected; the pH value is adjusted to be within 6.5-8.5 through lime; the plants are planted on the contaminated soil, the pteris vittata and the conyza canadensis are sowed in line alternately, clover seeds are subjected to even broadcast sowing, the overground parts of the plants areharvested each year, the harvested plants are incinerated, obtained ash is subjected to harmless disposal, with year as the remediation cycle, repeated harvesting and incineration are conducted, andremediation is completed till the content of arsenic-containing pesticides and PCP in the contaminated soil reach the value below the national standard limit value. In the multi-plant combined remediation method, the pteris vi