Safe infusion alarm

The invention relates to a safe infusion alarm. The alarm comprises a cavity (2) for containing liquid, wherein a floating plate (3) with changeable upper and lower positions is arranged at the bottomof the cavity (2); the floating plate (3) is connected to an alarm unit (7); the cavity (2), the floating plate (3) and the alarm unit (7) are all wrapped by a shell (1); the top of the shell (1) isprovided with a sharp corner (4) communicated with the cavity (2); one side, corresponding to the bottom of the cavity (2), of the shell (1) is provided with a jack (5) communicated with the cavity (2); and the bottom of the front face of the shell (1) is connected to the alarm unit(7). Compared with the prior art, the infusion alarm is simple in structure, small in size and convenient to operate,liquid weight is used for applying pressure to the floating plate, a floating plate switch and an alarm switch are used for controlling connection of an alarm unit circuit, an alarm can be sent out timely and reliably, the ala