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Objective To study the effect of mobile phone radiation on electroencephalograph (EEG).Methods Firstly,questionnaires were distributed to the college students to investigate the mobile phone types and their feelings.Three most frequently used mobile phones Nokia 6220C,Samsung GT-S3930C and Nokia 7610 were selected and their electromagnetic wave intensities were measured with NBM-520 electromagnetic radiation analyzer.Eleven students involved in the investigation were recruited to participate in the experiments.Their rest EEGs before phone call,30mins after phone call with and without using earphone were recorded by NT9200 digital EEG.The EEG power spectrum of different frequency bands in three different states were compared and analyzed by statistical software SPSS18.0.Results Thirty minutes after phone call without earphone,the power spectrum amplitude of α1 frequency band in all brain areas was greater than the other two states.The power spectrum amplitude of β2 frequency band before a phone call was greater than the other two states.However,statistical analyses showed that there was no significant difference in the three different states (P>0.05).Conclusions The effect of mobile phone radiation in short time on electroencephalographic signals is not significant.