This article conducts a multidimensional quantitative data analysis of writing scores and related variables such as word frequency, stroke number, and the number of components in the corpus of Chinese character acquisition of primary Chinese learners from non-Chinese culture circles, and then analyzes the cognitive characteristics and rules of Chinese character acquisition reflected in the data from the perspective of cognitive psychology. Data analysis shows that there are “stroke number effect” and “component number effect” when learners write Chinese characters, and the influence of the stroke number and component number on writing depends on the level of Chinese characters in the whole book frequency, and the dividing line is about 200. From the perspective of cognitive rule, frequency, stroke number and component number affect the whole process of perception, memory and extraction of Chinese characters. There are differences in the recognition methods of Chinese characters with different frequencies when writing. Learners use compressed and holistic recognition for high-frequency words (frequency>200), while partial and feature recognition for medium and low-frequency words (frequency≤200), and the basic units of feature recognition are strokes and components.The score of wrongly used characters is not significantly correlated with frequency, strokes and components, and the cognitive rules reflected by wrongly used characters need further study.