Abstract: This paper aims at exploring the application of the contingency table to phytogeographical research. By applying contingency table to exploring Larix potaninii distribution, the effects of both vertical altitude and latitude on vertical altitude interaction, latitude interaction as well as alternate interaction have been found, and that on the plant’s distribution has also been found. Because of allying using x2 test, analysis of residuals, order table association test, log-linear models fitting, the method of log-linear models fitting has been changed in some way. This preliminarily study proves that the contingency table may be successifully used with phytogeographical research.