The invention discloses a selenium-enriched foliar fertilizer special for honeysuckle flower and a preparation method thereof, and relates to the technical field of the production of fertilizers special for flowers and plants. The preparation method comprises the following steps of: batching urea, triple superphosphate, potassium sulfate, chitin, sodium selenite, trace elements, an emulsifier, poly aspartate and brassin lactone in a specific ratio; dissolving the chitin in acetic acid, dissolving the brassin lactone in alcohol, the water-soluble poly aspartate and the emulsifier; and adding a selenium source substance and the trace elements with stirring, and adding the mixture into phosphorus potassium solution under constant volume to obtain a finished product. The selenium-enriched foliar fertilizer special for the honeysuckle flower has the advantages of promoting the growth and development of the honeysuckle flower, improving the selenium content and zinc content of the honeysuckle flower, improving the utilization rate of the fertilizer, improving the yield and quality of crops, along with high content of total nutrient and obvious effect of yield increase.