The present invention relates to a special seed fertilizer for strong rice seedling liquid suspension and a preparation method thereof. The special seed fertilizer for strong rice seedling liquid suspension includes the following components by weight: 2.0-2.5 parts of fulvic acid, 4.0-8.2 parts of a zinc fertilizer, 3.8-7.3 parts of a magnesium fertilizer, 33.8-44.2 parts of a phosphate fertilizer, 4.0-5.0 parts of urea, 5.0-13.0 parts of a potash fertilizer, 7.7- 8.6 parts of a suspending agent and 25.0-27.5 parts of water. The special seed fertilizer for strong rice seedling liquid suspension provided by the invention can provide the nutrition required for the initial growth stage of paddy rice, has comprehensive nutritive elements to promote better growth of paddy rice root. The seed fertilizer is the most economical and effective fertilization method.