The invention discloses a wall internal electric wire short circuit fire detector socket. The socket comprises a power supply part used for power supply and a fire alarm used for generating an alarm signal, wherein the power supply part is connected with the fire alarm; the power supply part is composed of a 220V mains supply socket and a voltage conversion circuit; a 220V mains supply is converted into a stable direct-current voltage for a system to use through the voltage conversion circuit; and the fire alarm comprises a controller, a smoke sensor, a temperature sensor, an acousto-optic alarm and a signal emitter. The socket provided by the invention has the characteristics of buzzer alarming, indicator light flickering and the like, is matched with a wall type socket connection wire and a power supply, detects initial fire faults caused by smoke, temperature rise and the like due to short circuit of the wire in 60 square meters, and can give an alarm in time.