The invention provides a carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound as well as a preparation method and application thereof. A structure of the carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound is shown in a formula I: the formula (1) is shown in the description, wherein R is alkyl, benzyl or aryl,and n is equal to 2 to 10. According to the carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound disclosed by the invention, by using natural chiral compound D-glucose with low cost, easy availability, good water solubility and rich stereochemistry as a chiral source of the carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound, under a condition of no additional addition of an alkaline additive, a carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium complex I is synthesized by adoptinga quick one-step method and is used as a palladium catalyst for catalyzing C-C coupled reaction, and no-water no-oxygen reaction conditions are overcome, so that a series of fluorene-derived conjugated small molecular functional materials having novel structures are prepared in a high yield manner.