This research is an attempt to probe into the priming effect of the grammatical structure in the production of the four-character Chinese idiom. A model of improved instantaneous memory is adopted with 60 university students majoring in Chinese language as subjects. The results suggest that the whether or not there is a similarity in the morpheme structure between the priming idiom and the target idiom, the grammatical priming effect exists when their move structure are the same. The findings of this research primarily indicate that there also exists a process of grammatical production and selection in the relatively solidified-structured four-character Chinese idiom and that this process of grammatical production and selection stems mainly from the move structure of the Chinese idioms. The production of the grammatical structure is an abstract process.