The invention discloses a safety vein infusion control device which mainly comprises a floating stop plug device and a drop storage cup, wherein the floating stop plug device is arranged in the drop storage cup and floated above an injection outlet of the drop storage cup, the floating stop plug device comprises a hollow floater and a water stop cover unit arranged below the floater, a hollow connector extending downwards is arranged in the floater, an annular groove is formed on the periphery of the connector, a jack is arranged at the lower end of the connector, the water stop cover unit isinserted into the jack through a connecting lug at the top end, the water stop cover unit is provided with a containing space and a stop plug film on the bottom, and the stop plug film can cover the injection outlet of the drop storage cup so as to be stuck on a stop plug.