Anti-drowning swimming chest strap

An anti-drowning swimming chest strap comprises a double-layer chest strap body. A buffer gas bag and a heartbeat sensor are arranged in the interlayer of the chest strap body, a high-pressure gas cylinder, a pressure sensor and a controller are arranged outside the chest strap body, the high-pressure gas cylinder is communicated with the buffer gas bag through a pipeline, a solenoid valve is arranged at the nozzle of the high-pressure gas cylinder and used for controlling opening and closing of the pipeline, a power module, a main control chip and a booster circuit module are arranged in the controller, and an emergency button is arranged outside a shell. The anti-drowning swimming chest strap is light and handy in structure and convenient to use; the same solenoid valve can be manually controlled by users or automatically controlled to inflate the buffer gas bag to achieve rescue, and therefore control is more reliable; in addition, whether drowning happens is judged through the combination of the pressure sensor and the heartbeat sensor, both subjective factors of the human body and objective factors of the surroundings are considered, and therefore the judgment result is more accurate.