Electroencephalography is a modern auxiliary test that amplifies and records the brain’s own weak bioelectricity as a graph to help diagnose disease through an EEG tracer. In the diagnosis of sleeping sickness, EEG plays an extremely special role, and plays a definitive diagnostic significance in determining whether sleeping sickness is caused by pathological factors. The EEG examination is graded as follows: 1. Mild abnormal EEG Alpha rhythm is very irregular or very unstable, and the open-eye inhibition response disappears or is not significant. High-amplitude beta waves appear in the frontal area or all areas. Q-wave activity increases, Q-activity is dominant in some areas, and sometimes Q-wave is seen in all areas. High-amplitude Q waves appear after hyperventilation. 2. Moderate abnormal EEG The frequency of α-node activity is slowed down and disappears, and there is obvious asymmetry. Diffuse Q activity is predominant. Paroxysmal Q-wave activity appears. After hyperventilation, high amplitude δ waves appear in groups or clusters. 3.Severe abnormal EEG Diffuse Q and δ activity is dominant, and high voltage δ activity is present between slow waves. α rhythm disappears or slows down. Paroxysmal δ waves appear. Spontaneous or evoked appearance of high-amplitude spikes, spikes, or spike-slow complex waves. Presence of bursting inhibitory activity or flattening activity.