The invention discloses a method for obtaining a uniform electric field for electrically repairing polluted soil. The method comprises the following steps: digging grouped channels or grooves of certain widths and depths at certain intervals in a field needing soil repair; filling current-conducting carbon particles being phi1.5-phi5 millimeters in particle sizes into the grouped channels or grooves; placing leading-in terminals of a power supply into the current-conducting carbon particles in the grouped channels or grooves to form parallel electrodes, wherein the number of the electrodes is 2*N or 3*N, and N is a positive integer. By adopting the method, a uniform soil repair electric field can be provided, spindle type electric field distribution is eliminated, and the problems of the need of repairing microorganism-polluted soil with a completely symmetrical electric field and the like are particularly solved. Compared with the distribution of linear electrodes or matrix electrodes, the method has the advantages of simplicity and easiness in making electrodes, low cost and higher efficiency.