One hour living circle has an important impact on regional economic development

government policy makers

and production and living of residents. The data for dividing one hour living circle are mainly from subway

national

provincial and county roads

in which subway is the most important

especially in populous metropolis. In this paper

while one-hour living circle of Guangzhou city was circled out based on its urban traffic network

the impact of metro system on the one-hour living circle was analyzed quantitatively and accurately. The results show that (1) onehour living circle of Guangzhou City in 2013 and 2020 cover ten districts of Guangzhou City and Foshan. (2) Since the main city is basically located in Yuexiu

Haizhu and Tianhe Districts

the area ratio of the three zones in 2020 are 100%. (3) In 2013-2020

the Huangpu

Panyu and Huadu districts are fastergrowing regions due to rapid growth of metro. (4) One hour living circle of Guangzhou basically has no island regions mainly because of well-developed Metro-Road network.