The invention belongs to the field of agricultural production, and discloses a sugar alcohol zinc boron molybdenum manganese compound colloidal solid leaf microelement fertilizer and a preparation method thereof. The colloidal fertilizer is composed of solid salts of various microelements, a pH conditioning agent, a chelating agent, a potentiating agent, a surface active material, an antibacterialagent and an adhesion agent. Firstly, heating reaction is carried out on molybdenum salt and the chelating agent, then solid boron salt, the pH conditioning agent, zinc salt, manganese salt, the potentiating agent and the adhesion agent which are evenly stirred are added, the surface active material and germicide are added, heating is carried out to make the mixture mixed evenly, so that the mixture is changed into jelly from liquid to obtain a compound fertilizer with high concentration, stability and good effect. According to the sugar alcohol zinc boron molybdenum manganese compound colloidal solid leaf microelement fertilizer and the preparation method thereof, after the prepared compound fertilizer is sprayed on the leaf surface, a surface active agent makes the microelement fertilizer spread on the leaf surface evenly, the adhesion agent resists washing of rainwater and prolongs the fertilizer efficiency time, the contained microelements are essential ingredients of the plant growth, the leaf fertilizers are stored and transported easily, and are dissolved easily when being in use.