The invention relates to a chelated powdery water-soluble leaf fertilizer containing a surfactant, which is applied in the field of agriculture and forestry. The leaf fertilizer consists of the following materials by weight percent: 25-45% of potassium sulfate, 15-55% of ammonium sulfate, 10-20% of monoammonium phosphate, 1-22% of calcium chloride, 0.1-0.7% of copper sulfate, 0.1-0.7% of zinc sulfate, 0.5-1% of borax, 0.1-1.0% 0f ferrous sulfate, 0.1-0.7% of manganese sulfate, 0.1-0.7% of ammonium molybdate, 1-12% of surfactant, 0.1-0.5% of EDTA (ethylene diamine tetraacetic acid), 0.1-3% of sodium citrate, 0.5-5% of sugar alcohol, 0.1-5% of monoethanol diamine and 0.1-1.0% of triethanolamine. The chelated powdery water-soluble leaf fertilizer is prepared by the steps of smashing, liquefying, chelating, drying and smashing the materials in a certain proportion, thus preparing the chelated powdery water-soluble fertilizer. By the reasonable proportioning of N, P and K materials and trace elements, the chelated powdery water-soluble fertilizer resistant to hard water and not prone to deliquescing and agglomeration is prepared; and the chelated powdery water-soluble leaf fertilizer has the characteristics of improving the comprehensive nutrition for the growth of crops, and being high in fertilizer efficiency, practical, wild in application and the like.