Seed coating agent of green cucumber

The invention discloses a cucumber seed coating agent. The formula thereof includes the following components by the weight percentages as follows: active component KH2PO4 1.0%-5.0%, paclobutrazol wettable powder 0.01%-0.05%, CuSO4 1.0%-4.0%, sticker 1.0%-5.0%, warning toner 1.0%-1.5%, and the rest is water. The cucumber seed coating agent of the invention belongs to the thin-film type and pre-coating type cucumber special seed coating agent and is applicable to the pre-coating treatment of cucumber seeds or the coating treatment before sowing. Rotten sprouts and dead seedlings caused by seed-borne and soil-borne diseases at seed germinating stage and seedling stage can be prevented and cured significantly, thereby increasing seedling percentage, preventing the formation of high seedlings and ensuring that the seedlings are even and robust.