The invention discloses a fertilizer for a farmland, wherein the fertilizer is prepared from, by weight, 20-50 parts of straw, 5-30 parts of ground phosphate rock, 5-30 parts of wheat middling, 2-10 parts of soybean meal, 5-30 parts of rice hull powder, 3-15 parts of urea, 15-30 parts of calcium nitrate, 5-8 parts of polyacrylamide, 15-25 parts of ferric sulfate, 1-5 parts of borax, 1-7 parts of manganese sulfate, 1-2 parts of copper sulfate, 1-2 parts of ethephon, 5-12 parts of ammonium molybdate, 10-15 parts of citric acid, 2-15 parts of trace elements, 5-8 parts of fertilizer synergist, 1-5 parts of ecological soil pesticide, 5-15 parts of magnetic water, and 3-20 parts of activating powder. The fertilizer for the farmland is high in fertility, and can promote crops absorption, improve crops quality, improve crops output, reduce the production cost, and reduce the pesticide application.