Objective　Our study aimed to investigate the relationship between post-stroke cognitive function and pre-stroke Chinese language input in patients with cerebral infarction,and to assess the writing function of patients with post-stroke cognitive impairment.Methods　(1)A total of 196 patients diagnosed with cerebral infarction were selected.Scores of various diagnostic scales,as well as writing,reading and use of electronic products before stroke were compared.The correlation between post-stroke cognitive function and pre-stroke Chinese language input,and the relationship between writing ability with cognition in various domains as well as the trend of changes were analyzed.(2)Chinese character writing training was used to analyze the prevention of post-stroke cognitive impairment and restoration of neurological function.Aphasia battery of Chinese (ABC) was used to assess the writing function of patients.Furthermore,the relationship between writing and cognitive functions,and the ABC scores were analyzed.(3)Patients’cognitive and neurological functions were evaluated again at 1st,3rd and 6th months after writing training to analyze the effect of writing training on the cognitive impairment and neurological function recovery.Results　(1)The total MMSE score and total MoCA score were significantly correlated with the writing and reading of Chinese characters in pre-stroke patients (all P<0.05),but were not significantly correlated with the use limit of electronic products.(2)Total score of MMSE was significantly correlated with transcribing,dictating,graph writing,and active writing (all P<0.05),while the total score of MoCA only had a significant positive correlation with the dictating, graph writing,and active writing (all P<0.05).(3)The total MMSE score at the 3rd and 6th months were significantly increased (both P<0.05).Conclusions　Pre-stroke writing and reading habits were associated with better post-stroke cognitive performance,whereas good pre-stroke writing and reading habits might have a protective effect on post-stroke cognitive function.There was a positive correlation between the level of post-stroke writing and the level of post-stroke cognitive function,suggesting that the post-stroke writing ability may affect the level of post-stroke cognitive function.Writing training might improve cognitive impairment after stroke.