The present invention discloses a low-power-consumption wireless smoke alarm device and belongs to the sensing, detection and safety alarm technical field. The low-power-consumption wireless smoke alarm device comprises a micro control unit, a smoke sensor, a data acquisition module, an alarm circuit, a switching quantity control circuit, a micro power wireless module and a power source module; the micro control unit is connected with the data acquisition module, the power source module, the switching quantity control circuit, the alarm circuit and the micro power wireless module; and the dataacquisition module is connected with the smoke sensor. According to the low-power-consumption wireless smoke alarm device, the micro control unit which adopts a Cortex M3 architecture is used to perform control, and therefore, a low power consumption mode and an A/D conversion function can be realized; an ion type MQ-2 smoke sensor module is adopted as the smoke sensor, and therefore, high sensitivity is realized, and early warning can be realized more quickly; and the wireless analysis and warning of the device are realized through the micro power wireless module, and therefore, data are more sensitive than data obtained through a manual mode, and reaction time is decreased, and the debugging efficiency of the warning is improved, and safety is enhanced.