NOVELTY - Soil bio-electrochemical repairing agent comprises 10-20 parts mass grass, 5-15 parts mass Chrysanthemum, 5-15 parts mass polyphenol powder, 10-20 parts mass jujube essence, and 45-55 parts mass sodium metasilicate. The repairing agent comprises liquid bio-electrochemical repairing agent and powder bio-electrochemical repairing agent.    USE - Soil bio-electrochemical repairing agent is useful for paddy field and dry land (claimed).    ADVANTAGE - The soil bio-electrochemical repairing agent improves the soil, restrains the mildew of soil, reduces the amount of fertilizer and pesticide application and crop injury, increases the quality of crop, and is pollution-free.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of soil bio-electrochemical repairing agent, which involves adding 10-20 parts mass grass, 5-15 parts mass Chrysanthemum, 5-15 parts mass polyphenol powder, 10-20 parts mass jujube essence, 45-55 parts mass sodium metasilicate and water in a reaction kettle at 95-105 degrees C for 2.5-3.5 hours, cooling to room temperature, soaking for 45-55 hours, heating at 95-105 degrees C, reacting for 10-12 hours, adding 0.4-0.6 times grass, polyphenol powder, jujube essence and sodium metasilicate, heating at 95-105 degrees C, keeping the temperature for 0.5-1.5 hours, stirring for 20-40 minutes, heat-preserving for 1.5-2.5 hours and stirring for 20-40 minutes, natural cooling to room temperature, naturally fermenting obtained material, heating obtained material at 95-105 degrees C, heat-preserving for 1-2 hours, stirring for 20-40 minutes, cooling to room temperature, naturally sedimenting for 120-168 hours, heating obtained clear liquid at 95-105 degrees C, adding 0.04-0.05 wt.% citric acid to clear liquid, stirring for 20-40 minutes, cooling to room temperature, leaving to stand for 22-26 hours, heating obtained material at 95-105 degrees C, heat-preserving for 1-2 hours, adding 0.08-0.12 wt.% ethanol, stirring for 10-30 minutes, cooling at room temperature and performing natural sedimentation for 120-168 hours, and filtering obtained solution with filter of 300-400 mesh; and (2) application of soil bio-electrochemical repair agent for paddy fields and dry lands, when used in paddy fields, the amount of liquid soil bio-electrochemical repair agent is 20-40 kg/ mu m, and the amount of powder soil bio-electrochemical repair agent is 8-30 kg/ mu m, and when used in dry land, the amount of liquid soil bio-electrochemical repair agent is 30-50 kg/ mu m, and the amount of powder soil bio-electrochemical repair agent is 15 -30 kg/ mu m.