The utility model provides an accurate air conditioner locking alarm device that leaks, including water sensor, DC power supply's positive negative pole is connected to its first port, wherein the first end -to -end joint DC power supply's of first port positive pole, second end -to -end joint DC power supply's negative pole, the probe that leaks is connected to water sensor's second port, water sensor's third port is NO -contact, and wherein DC power supply's positive pole is connected to the first end -to -end joint DC power supply's of third port negative pole, second end -to -end joint to parallelly connected stand by lamp and speaker, this parallel circuit's the other end, water sensor's fourth port is the normally closed contact, the first extreme point of control port on the first end -to -end joint DC power supply's of fourth port the negative pole, second end -to -end joint solenoid valve wherein, the second end -to -end joint DC power supply's of control port positive pole. Above -mentioned accurate air conditioner locking alarm device that leaks can close the inlet tube when accurate air conditioner leaks, the reputation can also be sent and signal maintainer is reported an emergency and asked for help or increased vigilance.