The invention provides a method for distributing service and time of service density in mobile communication, wherein, the time distribution method includes: step one, the portfolio of 24 hours of a base station subdistrict is calculated, and whether the portfolio of a busy system is equal to the portfolio of a busy subdistrict is judged, if yes, step two is carried out, otherwise, step three is carried out; step two, 'one' is taken as a magnification factor of the portfolio as time fluctuates; step three, a non-uniform coefficient of the portfolio of all moments is calculated when the portfolio of the subdistrict surpasses the portfolio of the busy system; step four, based on a magnification factor calculated according to the non-uniform coefficient, the dimension of a non-uniform coefficient G is judged; step five, according to the magnification factor, the distribution of a voice service and a data service is programmed. The invention takes advantages of the existing service data and fully considers time fluctuation property and malconformation of the service, thus a telephone traffic distribution is closer to a real condition in details.