Child bed-wetting alarm

A child bed-wetting alarm is characterized in that: one end of a sensor housing is connected with a humidity sensor, the humidity sensor is connected with one end of a transmission line, the other end of the transmission line is connected with a transmission line input interface, the transmission line input interface is arranged at a sidewall of a controller box body, a microprocessor is connected in the controller box body, and the microprocessor is respectively connected with light-emitting diodes, a button, a battery, a loudspeaker and the transmission line input interface. The child bed-wetting alarm of the utility model has the beneficial effects that: an amplifying circuit and an A/D (Analog-to-Digital) conversion circuit need not to be added, thus the child bed-wetting alarm may have the advantages of simple system and low cost; the humidity sensor can be placed in a baby diaper or under a bed sheet, so that the child bed-wetting alarm can give an alarm immediately when the bed-wetting occurs, thus the