Disclosed area method and apparatus for acquiring a PMI, and a storage medium. The method includes: searching a first group of PMI parameters according to first initial values of a PMI parameter set, and determining the first group of PMI parameters corresponding to the maximum capacity as a first group of reported values; generating second initial values of the PMI parameter set; searching a second group of PMI parameters according to the second initial values of the PMI parameter set, and determining the second group of PMI parameters corresponding to the maximum capacity as a second group of reported values; generating third initial values of the PMI parameter set; and searching a third group of PMI parameters according to the third initial values of the PMI parameter set, and determining the third group of PMI parameters corresponding to the maximum capacity as a third group of reported values.