Amino acid calcium boron chelated foliar fertilizer and preparation method thereof

The invention discloses an amino acid calcium boron chelated foliar fertilizer and a preparation method thereof; the fertilizer is a liquid fertilizer prepared by chelating a calcium containing compound and a boron calcium containing compound with amino acids in the presence of EDTA, a surfactant and an additive, wherein, the amino acid is not less than 100 g/L; the calcium is not less than 30 g/L; the boron is not less than 2.5 g/L; and the mass ratio of EDTA is 2-4%. The application of the amino acid calcium boron chelated fertilizer can promote fruit expansion, increase single fruit weight, reduce or treat bitter pit diseases, blossom-end rot, and black red-dot diseases caused by calcium and boron deficiency, thus increase fruit yield, improve fruit quality, and significantly improve economic benefits.