Provided is a method for PCI classified self-configuration, including: according to the characteristic of PCI code, dividing all PCIs into ΔL large groups in accordance with a step length ΔL, and then dividing resources of each of the large groups into ΔS small groups in accordance with a step length ΔS, generating a PCI resource list, and identifying each PCI by three sections of address codes representing a large group number, a small group number and an intra-group number of the PCI, respectively; mapping the PCI resources one by one to new base stations in accordance with a classification that each new station and heterogeneous nodes covered thereby correspond to a small group of PCI resources; allocating a first PCI in each small group of PCI resources to a new base station, and randomly allocating the remaining PCIs in the small group of PCI resources to the covered heterogeneous nodes.