The invention discloses a MR (Measurement Report) data indoor and outdoor separation method based on a statistic model. The MR data indoor and outdoor separation method comprises the steps of: aiming at MR sampled data of each cell of an outdoor macro station, carrying out characteristic value statistics of received signals, which comprises statistics of a main cell level; and carrying out separation of a mixed Gaussian distribution and probability calculation, and according to an indoor probability, obtaining a corresponding indoor and outdoor separation result. Moreover, the MR data indoor and outdoor separation method supports combination of various factors of the main cell level, a main and adjacent level difference, the number of adjacent cells and the like, and by a combined model, an indoor and outdoor judgment result is judged and output; and judgment methods at other angles also can be integrated. According to the MR data indoor and outdoor separation method disclosed by the invention, data characteristics which are shown by signal intensity and a signal number of the MR data in a statistical sense and are combined by two indoor and outdoor normal distributions are utilized, and probabilities that different signal intensity and different signal numbers occur in a door or outside a door can be calculated, so that the method of separating the MR data according to signal characteristics is more feasible, and accuracy of indoor and outdoor separation of the MR data is improved.