High-risk medicine extravasation alarm device

The utility model discloses a high-risk medicine extravasation alarm device which comprises an attaching piece, a sensing piece and a stopping assembly, and the attaching piece is suitable for being attached to a needle inserting part to fix a needle head; the sensing part is arranged on the attachment part and used for sensing the humidity of the attachment part so as to send out a sensing signal; the stop assembly is connected with the induction part and arranged on the infusion tube, the stop assembly has an initial state and a stop state, and when the stop assembly is in the initial state, the infusion tube is conducted and opened; and when the stop assembly receives the sensing signal, the stop assembly is switched from an initial state to a stop state, so that the infusion tube is closed and disconnected. According to the utility model, continuous seepage of medicine can be avoided, so that the injection input process can be monitored in time, a contrast agent is prevented from eroding skin tissues of a