The invention discloses a paddy rice fertilizer capable of inhibiting ineffective tillering. The paddy rice fertilizer capable of inhibiting ineffective tillering is prepared from strigolactone, Na2SiO3*9H2O, diatomite, urea, potassium chloride, high water absorption resin, zinc sulfate, p-chlorophenoxyacetic acid soduim salt, abscisic acid, willow bark extract product, amino-oligosaccharin, and maleic hydrazide. In applications, a tillering inhibition agent is used for inhibiting tillering close at elongation stage; a plant growth inhibition agent and a silicon fertilizer are adopted to shorten the internode length of paddy rice basal parts, shorten plant height, improve lodging resistance and disease resistance; a nitrogenous fertilizer and a potash fertilizer are adopted as a floweringpromoting fertilizer and a flower protective fertilizer, to increase tillering spike rate and setting rate; yield increasing effect is obvious. The paddy rice fertilizer is capable of simplifying elongation-heading stage management, avoiding complex field drying operation, saving manpower, reducing elongation-heading stage management technology requirement, and improving economic benefit.