This thesis carries out a morphological analysis of the complex words listed in the index of Taiwan senior high school English textbooks. According to the analysis of the derived words in the vocabulary list, forty..........seven prefixes and seventy..........seven suffixes are used to form the derived words. These pre..........fixes and suffixes are used to form the derived words. These pre..........fixes and suffixes are introduced in different qroups classified according to the meaning the prefixes and suffixes carry. The morphophonemic rules which are obligatorily applied during the derivational processes of forming those derived words are also introduced and so are derivation patterns. The compounds in the vocabulary list of the six English textbooks fall into two main categorise: traditional compounds and neo..........classical compounds. Traditional compounds are divided into several groups according to their syntactic categories, and they are further divided into subgroups based on their internal structures. In the thesis, the combining forms used to make the classification of ICFs and FCFs. It is not claimed that the analysis of the 1480 complex word done in this thesis is complete since some residual problems still need further studies. But, we are definitely convinced that the analysis indeed a strategy our senior high school English teachers might as well adopt for teaching their students how to memorize or recognize English complex words.