Based on the background of Gutian country-level green-way planning project, this essay carries out suitability evaluation and empirical study of green-way network selection based on GIS.The main study contents include: According to the green-way network selection principles and analysis of basic construction conditions,taking overlay analysis of GIS quantitative suitability , and putting forward a set of more universal green-way network selection factor evaluation system. Inviting experts to determine the score for each factor score by questionnaires and e-mails, and writing a AHP program for calculating factor weight of, then this essay uses the space analysis modeling module of GIS software to make weighted overlay analysis on evaluation factors layer data so to obtain suitability analysis results. Finally, superior planning, that is municipal planning routing and experts recommend points are taken as a suitability evaluation results graph to verify, and the verification are to confirm the applicability of this evaluation method and the rationality of the results.