NOVELTY - Method for improving planting technique for increasing rice yield, involves administering composite biological bacteria fertilizer as base fertilizer before sowing, where the composite biological bacteria fertilizer comprises inorganic compound fertilizer and organic biological bacteria fertilizer in a weight ratio of 0.5-1.5:0.5-1.5, preparing the grafting period of the liquid fertilizer and spraying the fertilizer on crops of different stage.    USE - The method is useful for improving planting process for increasing rice yield (claimed).    ADVANTAGE - The liquid fertilizer continuously releases nutrients, promotes photosynthesis of crops, improves nutritional element utilization rate, enhances stress resistance of crops, is nontoxic and environmentally-friendly, improves soil structure, and increases soil water storage fertilizer-retaining ability and permeability.    DETAILED DESCRIPTION - Method for improving planting technique for increasing rice yield, involves administering composite biological bacteria fertilizer as base fertilizer before sowing, where the composite biological bacteria fertilizer comprises inorganic compound fertilizer and organic biological bacteria fertilizer in a weight ratio of 0.5-1.5:0.5-1.5, preparing the grafting period of the liquid fertilizer and spraying the fertilizer on crops of different stage, where the liquid fertilizer comprises 18-25 pts. wt. urea, 17-20 pts. wt. potassium dihydrogen phosphate, 1-2 pts. wt. boric acid, 8-12 pts. wt. ammonium phosphate, 1-2 pts. wt. zinc sulfate, 0.5-1 pt. wt. manganese sulfate, 0.5-1 pt. wt. copper sulfate, 0.5-1 pts. wt. ferrous sulfate, 1.5-2 pts. wt. magnesium sulfate and 25-35 pts. wt. humic acid. An INDEPENDENT CLAIM is included for method of preparing liquid fertilizer, which involves mixing humic acid, zinc sulfate, manganese sulfate and copper sulfate to obtain solution A, mixing ferrous sulfate, EDTA and water to obtain solution B, mixing boric acid, manganese sulfate, magnesium sulfate, potassium dihydrogen phosphate and glacial acetic acid to obtain solution C, then mixing the solution A, solution B and solution C in a weight ratio of (26.5-38):(9-13.5):(19.5-27.5), adding urea and ammonium dihydrogen phosphate, mixing uniformly, then adding urea, ammonium dihydrogen phosphate and humic acid, adjusting pH value, filtering the mixed solution and obtaining the finished product.