Objective To analyze the cerebral infarction risk of premonitory apoplexy syndrome（ PAS） patients with different TCM institutions so that to provide reference for PAS constitution intervention research. Methods ABCD2 score was adopted for 75 PAS patients included in the study. The patients were grouped into low-risk（0

3

）

moderate-risk（4

5

） and high-risk（6

7

） according to the scores. The institutions were distinguished by TCM constitution questionnaire. The occurrence rate of cerebral infarction of patients with different constitutions and risks on the 2nd and 7th day were observed. Results Phlegm-damp（ 32. 00%） and yin-deficiency（ 24. 00%） constitution were mostly seen in PAS patients. There were 8 cases developed into cerebral infarction on the 2nd day and 13 cases developed into cerebral infarction within 7 days. The occurrence rate in 7 days was 17. 33%. There was a statistical significance between different risk levels in the occurrence of cerebral infarction within 7 days（ P

<

0. 05）. There was no statistical significance between different constitutions in the occurrence of cerebral infarction within 7 days（ P

>

0. 05）. But patients with phlegm-dampness constitution had the highest occurrence rate（ 25. 00%） and followed by patients with yin-deficiency constitution（ 16. 67%）. There existed a positive correlation between phlegm-dampness and yin-deficiency constitution and ABCD2score（ P

<

0. 05） and a negative correlation between normal constitution and ABCD2score（ P

<

0. 05）. Conclusion PAS patients with different constitutions may have different cerebral infarction risks. Patients with phlegm-damp constitution have the highest risk and followed by patients with yindeficiency constitution. Therefore

PAS intervention therapy can be made in clinic according to patient’s constitution.