The invention relates to 
medicine and 
food preparation technology, and aims to provide the application of 
dendrobium officinale leaves, sealwort and radish seeds in the preparation of medicines for treating hypertension.  Including: take dried leaves of 
Dendrobium officinale, 1-25 parts of sealwort, or 1-25 parts of raisin seeds, heat water to extract twice, combine the two extracts and then concentrate; 
grind the leaves of 
Dendrobium candidum to 
fine powder,  Add to the combined extract; Add excipients according to the conventional pharmaceutical 
processing method to make various dosage forms of drugs for the treatment of high 
blood pressure, food and 
medicine homologous food with the function of treating high 
blood pressure, or 
health food with the function of lowering 
blood pressure  .  In the present invention, the 
Polygonatum water extract is used in conjunction with 
Dendrobium officinale leaves, and its antihypertensive effect is greatly improved.  
Dendrobium officinale leaves are directly used as 
medicine after "
grinding into 
fine powder". The utilization of medicinal ingredients is more complete than traditional methods such as 
water extraction, which is beneficial to the improvement of antihypertensive effect.  Combined with radish seed water extract, it can achieve both qi and yin supplements, while promoting qi and lowering qi, nourishing without stagnation, and improving the 
curative effect.