Abstract: As the big climate difference for different regions in China, the applicable types of passive solar heating technologies for passive solar buildings vary from different regions. This paper proposes a method that uses three indexes,namely southbound coldest radiant temperature difference ratio, heating degree days and winter outdoor temperature day difference degree days to describe the climate suitability, heating demand and the difference of outdoor temperature fluctuations in winter,respectively. Firstly,the regions are divided into two levels in China according to two indexes, the southbound coldest radiant temperature difference ratio and heating degree days, collected from 270 meteorological stations. The unsuitable for using passive solar heating technology regions and low demand regions are excluded. In addition, considering the effect of outdoor temperature fluctuation, the winter outdoor temperature difference degree days are used as third index. Finally,22 regions with different suitability, heating demand and temperature fluctuation are classified. This climate region division method helps to choose the appropriate passive solar technology according to local conditions.