Abstract: The paper aims to quantitatively describe the suitability of the climate conditions for the growth and development of potato in full growth period. Based on the potato observation data and meteorological data in Wulanchabu of Inner Mongolia, the authors constructed the climate suitability model at 10 days scale by using polynomial fitting method, and established the climate suitability dynamic evaluation index during potato growth process in Wulanchabu, and analyzed the correlation of climate suitability with plant height and yield. The results showed that: there was a significantly positive correlation (P<0.05) between the climate suitability and the plant height and yield; the correlation coefficient (R) was 0.2881 (57 digital samples) of climate suitability and plant height, was 0.3633 (32. digital sample) of climate suitability and yield. The model of climate suitability at 10 days scale can more finely describe the continuous change process of climatic suitability of potato.