Application of photosynthetic bacteria fermentation broth in pesticide and metal combined contamination soil

The invention provides application of photosynthetic bacteria fermentation broth in pesticide and metal combined contamination soil. In the application, the photosynthetic bacteria fermentation broth with the number effective viable bacteria to be between 108 and 1,010 per millimeter is diluted to 10 to 150 times with water; the fermentation broth is uniformly sprayed to degrading bacteria treated soil in dosage of between 10 and 50kg per mu; the earth surface is turned over for about 20 cm after the spraying is completed to ensure that the broth and the soil are sufficiently mixed and the photosynthetic bacteria can degrade residues of carbamic acid ester pesticide in the soil in high efficiency; and simultaneously, the bioavailability of the metal can be reduced to repair the carbamic acid ester pesticide and metal combined contamination soil. The photosynthetic bacteria has wide raw material sources, low price and easily controlled growing condition, can use low molecular organic substances as photosynthet