The invention relates to an alarm feed box. The alarm feed box comprises a material box, a buffer plate, a screen, an impurity removal door and a discharging pipe. The buffer plate is obliquely arranged in the middle in the material box. The buffer plate is located below a discharging opening of an ore pulp pipeline. The screen is horizontally arranged in the middle in the material box and is connected with the buffer plate. The impurity removal door is arranged on the side wall, on the side, away from the buffer plate, of the screen, of the material box. The discharging pipe is arranged belowthe impurity removal door and communicates with the bottom in the material box. An alarm is arranged at the upper end of the material box. A temperature and humidity relay is arranged in the materialbox. The alarm is connected with a power source through the temperature and humidity relay. Compared with the prior art, the temperature and humidity relay of the alarm feed box inducts the humidityin the material box, when the humidity in the material box is lower than a set value, electric energy of the power source is transmitted to the alarm, it is guaranteed that the humidity of ore pulp inthe material box is stable, and feed is stable.