In the context of dictionary based Chinese Mongolian word alignment task, this paper proposed an approach to align Chinese Mongolian numerals. The main idea of the approach is to transform Chinese and Mongolian numerals into the Arabic numerals respectively before calculating their similarities and aligning them. The transformation is based on a two dimensional list called numtable, which includes the basic Chinese (or Mongolian) numerals and the corresponding Arabic numerals. Each numeral in the numtable is assigned an indicative value of "1" or "2", indicating whether the numeral in question is a multiple of "10". According to the indicative value, the transformation module carried out a series of inference and transformed the Chinese and Mongolian numerals into the Arabic numerals respectively. In the whole transforming process, not only the divergence between Chinese and Mongolian numerals were taken into account, but the different types of numerals in each language were handled differently.