The invention relates to a Chinese drug for calming endopathic wind and reducing blood pressure and a preparation method thereof. The Chinese drug is used for treating hypertension, encephalemia, hemiparalysis, limb and trunk paralysis, slurred speech or facial hemiparalysis, and is prepared as pills with cinnamon, achyranthes root, prepared rehmannia root, fructus toosendan, tortoise plastron, selfheal spike, capillary artemisia, white peony root, radix scrophulariae, asparagus root, malt, liquorice, oyster, leech 5, fossil teeth, skunk bush, goldthread root, medcinal evodia fruit, white atractylodes rhizome, uncaria, tuckahoe, gastrodia elata, ruddle, cortex eucommiae and parasitic loranthus. When being taken, the Chinese drug is boiled for 35-40 minutes in clean water, and the supernatant is used for preparing soup; or the Chinese drug is boiled for 5-10 minutes in clean water, dried and ground to powder, mixed in a tile basin, and stirred thoroughly and made into pills or capsules. The weight of each pill is about 6g, and the weight of each capsule is about 1g. The Chinese drug has the function of treating the hypertension, encephalemia, hemiparalysis, limb and trunk paralysis, slurred speech and facial hemiparalysis. The preparation method has the advantages of low manufacturing cost, simple process, fast absorption, high cure rate, less recurrence and no toxic side effect.