The present invention relates to a nutrient synergist rich in meso and trace elements of sulfur and zinc and an application thereof. The nutrient synergist consists of 38%-75% of a meso and trace element component, 0.5%-4% of a dispersant, 0.5%-6% of a wetter, 0.5%-5% of a film former, 0.5%-5% of a film former aid, 0.5%-5% of a filler, 19.5%-40% of water, and 0.5%-2% of a pigment. After the components are evenly mixed, the resultant product is a flowing emulsion. The film former aid is ethanol or dodecyl alcohol ester. The nutrient synergist can rapidly and efficiently form a meso and trace element nutrient layer on the surface of a fertilizer or on the surface of seeds without drying, and has good foliar spraying performance and suspension fertilizer performance. The nutrient synergist is applicable to: coating of granular macroelement fertilizer and powdered fertilizer, to provide the fertilizer with meso and trace element nutrients such as sulfur and zinc coating of seeds, to improve seed vigor and germination rate and to provide seedling activity foliar spraying, to provide rapid supply of meso and trace element nutrients such as sulfur and zinc for crops and drip fertigation, to allow access to crop roots together with other macroelement fertilizers, and to be absorbed by the crop roots.La présente invention concerne un synergiste de substance nutritive riche en éléments méso et en oligo-éléments à base de soufre et de zinc et une application de celui-ci. Le synergiste de substance nutritive est constitué de 38 % à 75 % dun composant à base déléments méso et doligo-éléments, 0,5 % à 4 % dun dispersant, 0,5 % à 6 % dun agent mouillant, 0,5 % à 5 % dun agent filmogène, 0,5 % à 5 % dun adjuvant dagent filmogène, 0,5 % à 5 % dune charge, 19,5 % à 40 % deau et 0,5 % à 2 % dun pigment. Après que les composants ont été uniformément mélangés, le produit obtenu est une émulsion fluide. Ladjuvant dagent filmogène est léthanol ou un ester dalcool dodécylique. Le synergist
