Objective To study the analysis of folic acid combined with vitamin for level two ischemic stroke prevention effect. Methods From April 2013 to January 2014 in our hospital , selected the patients with stroke in 100 cases as the research object. In digital method were randomly divided into observation group (50 cases) and control group (50 cases). The patients in the observation group was taken folic acid combined with vitamin , the control group only was given vitamins, in all patients on admission and at discharge on the plasma levels of Hcy, D-two dimer, fibrinogen, three glycerol, total cholesterol, high density lipoprotein cholesterol and low density lipoprotein cholesterol level, the effect of folic acid combined with the vitamin was observed. Results No significant differences between the two groups before treatment, plasma Hcy levels (P>0.05) in different ways, the observation group after treatment, the plasma Hcy levels were significantly lower than the control group , with significant difference ( P<0 . 05 ) . Two groups by different ways of treatment, the observation group was best accounted for 70% (35/50), the excellent and good rate was as high as 98% (49/50), significantly higher than the control group 44% (22/50) and 74% (37/50), with significant difference (P<0.05). On two groups of different ways of treatment of cerebral was stroke recurrence and score in patients with SIAS were compared, the recurrence rate of the observation group was lower than the control group, with significant difference (P<0.05), the SIAS score was significantly higher than that of the control group, with significant difference (P<0.05). Conclusion For the patients with stroke, should the use of folic acid combine with vitamin two level of prevention. The combine uses of folic acid and vitamin , can effectively reduce the incidence of stroke and recurrence rate.