Lising methotrexate or thymidine treatment to induce synchronous division, combined with GTG technique, the high resolution banded chromosomes of seven domestic pig breeds of China were investigated. No distinct difference was found among then. Hence, in line with The International System for Human Cytogenetic Nomenclature, a standard idiogram of high resolution G-banded karyotype of domestic pig is suggested in this paper. In the idiogrammatic presentation of G-banding pattern, all the regions and bands of each pair of chromosomes are designated and described with slight modifications for the landmark system. Up to 444 bands were detected per haploid set, including the X and Y chromosomes, a number nearly two times as much as that in banded metaphase chromosomes.