A method for generating a category clustering data via a code division multiple access (CDMA) structure comprises the steps of: dividing a dataset to generate dataset categories; and generating the category clustering data via the CDMA structure processing the dataset categories according to the dataset categories; wherein the dataset includes a plurality of variable sequences; wherein dividing the dataset includes the step of: using a variable slope of each of the variable sequences to perform a segment division on a corresponding variable sequence to generate a plurality of segments; and using a distance, an angle and a slope to perform an affinity group on the variable sequences to generate a plurality of groups. The method for generating the category clustering data via the CDMA structure can make the category clustering data to have a very high similarity.