The invention discloses a special florescence prolonging medicament for a flower of a rape flower. The special florescence prolonging medicament for the flower of the rape flower is prepared from the following raw materials in parts by weight: 5 to 10 parts of 6-benzylaminopurine, 6 to 12 parts of naphthylacetic acid, 4 to 8 parts of 2, 4-dichlorphenoxyacetic acid, 2 to 4 parts of indoleacetic acid, 2 to 4 parts of gibberellin, 1 to 6 parts of aminoethoxyvinylglycine, 2 to 8 parts of aminooxyacetic acid, 1 to 3 parts of silver nitrate, 2 to 4 parts of silver thiosulfate, 5 to 12 parts of diethyl aminoethyl hexanoate, 5 to 8 parts of forchlorfenuron, 8 to 12 parts of compound sodium nitrophenolate, 7 to 10 parts of thiocarbamide, 6 to 10 parts of chloroethanol, 6 to 12 parts of hydrogen peroxide, 3 to 5 parts of brassinolide, 3 to 5 parts of triacontanol, 5 to 8 parts of paclobutrazol, and 1 to 2 parts of chlormequat chloride. The special florescence prolonging medicament for the flower of the rape flower has the beneficial effects that the special florescence prolonging medicament for the flower of the rape flower, which is provided by the invention, can effectively prolong the florescence of the flower, is further small in toxic action, and basically has no influence on an environment.