The invention relates to a danger electric shock risk informing device. The danger electric shock risk informing device comprises a frame and an infrared sensor. The infrared sensor comprises a transmitter and a receiver. The frame is provided with a light-emitting light source, the light-emitting light source is used for achieving infrared rays emitted by a transmitter light source, and the receiver receives light beam signals obtained after light emitted by the transmitter is reflected by an obstacle. The frame is provided with a polariscope for removing and filtering out scattered light in the light beam signals, and an alarm assembly is connected to the infrared sensor. The device has the advantages that the obstacle is inducted through the infrared rays emitted by the light-emitting light source through the transmitter, the light is reflected into the receiver through the obstacle, the receiver receives the signals and transmits the signals to the infrared sensor, the infrared sensor transmits signals, the alarm assembly gives an alarm, the obstacle is inducted based on the reflection principle, the detection flexibility can be achieved, the device can adapt to the occasions wherein personal safety is in danger and achieves an alarm effect, safety is improved, safe and stable operation of a power grid is maintained, and working efficiency is improved.