1. A method comprising: a computer device receiving a Chinese document including chemical names; the computer device recognizing chemical name segments in said document; the computer device recognizing non-chemical name segments in said document, wherein the computer device recognizing said non-chemical name segments in said document comprises: segmenting said document into words; checking whether each segmented word is in a non-chemical name segment dictionary; provided that said segmented word is in said non-chemical name segment dictionary, determining said segmented word to be a non-chemical name segment; and recording position information of said non-chemical name segment; and the computer device combining said chemical name segments to get said chemical names based on said recognized chemical name segments and non-chemical name segments to recognize said chemical names in Chinese documents, wherein the computer device recognizing said chemical name segments in said document comprises: segmenting said document into sentences; matching all of said chemical name segments appearing in sentences of said document based on a chemical name segment dictionary; recording position information of said chemical name segments; and reducing said chemical name segments in a same sentence, wherein reducing said chemical name segments in a same sentence is performed according to a principle of matching the most chemical name segments with the least number of chemical name segments; and wherein the computer device combining said chemical name segments to get said chemical name based on said recognized chemical name segments and non-chemical name segments comprises: determining adjacent chemical name segments in a same sentence according to said position information of said chemical name segments; checking whether there are non-chemical name segments between said adjacent chemical name segments based on said position information of said chemical name segments and non-chemical name segments; and provided that there are no non-chemical name segments between said adjacent chemical name segments, combining said adjacent chemical name segments to get a chemical name.