The invention relates to a medication composition and a process for preparation the invention which is for improving cerebral cognitive function disorder, preventing and curing senile dementia. The medication composition of the invention is composed of curcuma, ginkgo leaf and thinleaf milkwort root-bark which are prepared by the techniques of weighting, drying, crashing, marinating, poaching, ethanol extracting, condensing, merging and the like. The medication composition of the invention has the effects of opening the key to the mind, refreshing the brain, nourishing heart, invigorating thecirculation of blood, recuperating yin and yang, and resisting senescence, which is capable of improving study memorizing ability, and overcoming cerebral cognitive function disorder, thereby preventing and curing senile dementia.