The research for reading education is focused on phoneme recognition and word identification. It mainly utilizes oral reading upon the native speakers and the intermediate students. Consequently, only few researches have so far been made at silent reading upon the elementary students. The present paper does experimental work of silent reading upon the elementary students and investigates the factors affecting Chinese words identification. We come to the conclusion that these factors are similarity between pronunciation and form of a character, possibility of appearing sight word, and word superiority effect and so on. The majority of students can not distinguish the different forms of a character under the influence of word superiority effect. In particular, they do not see any variation between stroke of a Chinese character and radical of a Chinese character. Therefore, oral reading should be made together with silent reading upon elementary students, and careful education and control over the speed of reading are also required.