The invention relates to a fruit and vegetable juice essence for cleaning bruise, discharging toxicity and lowering blood pressure and blood fat and a method for health promotion and diet therapy thereof. The fruit and vegetable juicy essence is prepared by boiling balsam pears, celery, lemons, tomatoes, grapefruit, glutinous rice, soybean powder, malt, hawthorn, jujube, pearl barley, Gorgon fruit, pineapples, kiwifruits, crowndaisy chrysanthemum, carrots, oranges, dried plums, propolis, asparagus, aloe, apples, onions, coriander, ferment, fungus and other raw materials to extract plant essences thereof. In the invention, various fruits and vegetables having the functions of cleaning bruise, discharging toxicity and lowering blood fat are scientifically selected and matched, the proportion amount is three times a day by oral administration, 500-700ml is taken each time, and a traditional Chinese medicine physiotherapy technology, such as acupuncture, channels and collaterals massage, soaking feet with traditional Chinese medicine and the like is combined and fifteen days is one period of treatment. The results of clinic experiences show that aiming to the health care and treatment of sub-healthy people, such as people suffering from diabetes mellitus, hypertension and hyperlipemia and the like, the fruit and vegetable juice essence has obvious health care and conditioning functions.