The invention relates to an intelligent sleep assisting device based on hypnotism. The intelligent sleep assisting device comprises a detection electrode, a reference electrode, an analog-digital converter, a filtering circuit, a loudspeaker and a processor; the detection electrode and the reference electrode are connected with the analog-digital converter respectively and connected to the processor sequentially through the analog-digital converter and the filtering circuit; the detection electrode is used for detecting a bioelectric signal of a user in sleep, the analog-digital converter converts the bioelectric signal into a digital signal, low frequency filtering is conducted on the bioelectric signal through the filtering circuit, and the bioelectric signal subjected to low frequency filtering is input into the processor; the processor is used for collecting the bioelectric signal and identifying the current sleep state of the user according to the bioelectric signal; when the user is in a waking state currently, preset hypnosis guide words are played to conduct hypnosis on the user, and hypnotic depth of the user is detected; when the current hypnotic depth of the user reaches a predetermined hypnosis level, a sleep instruction is played to guide the user for falling asleep; the loudspeaker is used for playing a sound for the user. According to the intelligent sleep assisting device based on the hypnotism, the sleep assisting effect can be effectively improved.