The invention belongs to the technical field of running machines, and particular relates to a safety accessory device of a running
machine. The safety accessory device comprises wearable accessory equipment and an attention monitoring device. The wearable accessory equipment comprises an electroencephalogram collector, a
chip special for electroencephalogram
data conversion and a
wireless sending end, and the electroencephalogram collector is electrically connected to the
wireless sending end through the
chip special for electroencephalogram
data conversion; the attention monitoring device comprises a
wireless receiving end, a brain wave
signal processing module, a comparison module, a control module, a concentration degree display screen and an alarm, the brain wave
signal processing module receives data through the wireless receiving end and extracts the concentration degree from the data, and the brain wave
signal processing module is electrically connected to the concentration degree display screen and the comparison module. The control module controls the alarm to give an alarm and reduce the rotating speed of a motor of the running
machine. The safety accessory device has the advantages that
brain waves are collected, the concentration degree is extracted to regulate the rotating speed of the motor of the running
machine, a runner is reminded through the concentration degree display screen and the alarm, and it is guaranteed that accidents caused by
distraction of the runner are avoided.