Abstract: This paper explored implicit social cognition of impression formation in the area of social cognition, concerning priming effect of impression formation. This series of experiments consisted of 2 experiments and 1 80 subjects in all j oined in. The author adopted some Chinese idioms with different meanings as material, and manipulated the structure of priming stumulus. The results showed: 1 . Positive or negative idioms displayed in advance bad respective priming effect on impression formation that is not affected by level of processing. 2. This research on priming effect of impression formation opens an ideal way to study implicit social cognition.

Key words: implicit social cognition, priming effect impression formation, Chines- eidioms