The invention relates to a method of raising zero-valent iron chromium removal catalytic reduction activity in neutral condition, which is characterized in that the electrolyte with 0.1 to 0.5 mol ferrous sulfate, 0.3 to 0.6 mol boric acid, 0.4 to 0.7 mol ammonium sulfate, 0.003 to 0.006 mol saccharin, 0.003 to 0.006 mol ascorbic acid, 0.002 to 0.004 mol sodium dodecyl sulfate per liter is deposited. Add the produced zero-valent iron into the solution with Cr (VI) in. Oxalic acid, citric acid, salicylic acid, tartaric acid or humic acid can also be added into the solution. The Ph of the solution is adjusted to 6.5 to 8.0 and the Cr (VI) content in the solution reduces remarkably. The method has the advantages of simple preparation technology, convenient operation and low cost. The produced zero-valent iron has a diameter less than 50 nm and is of uniform granularity and high catalytic activity. With 2.2 times chromium removal efficiency of ordinary methods, the method of raising zero-valent iron chromium removal catalytic reduction activity in neutral condition has a promising application prospect in restoring polluted soil and sewage.