In the experiment, 4 male healthy divers were exposed in the He-N2-O2 saturation diving chamber for 21 days and stayed continuously at the depth of 300m for 7 days. Four meals were supplied daily during the exposure to high pressure. Three months prior to and during the period of exposure to high pressure, 2 pills of 9 vitamins compound were given to each diver per day, (a pill contained:YA 2500 IU, VB1 2mg, VB2 Img, VB6 1mg, VC 35 mg, VD2 200 IU, VE 1mg, nicotinamide 10 mg, D-calcium pantothenate 2 mg) and dietary survey, weight measurement and vitamins excretion test were performed. The result showed that the intake of food and calorie were much higher than that prior to and after decompression. The divers were found of the foods with high protein, high carbohydrate, low fat, and full of vitamins, but detested high fat food during exposure to high pressure. Their weights were slightly decreased as compared with those in other experiments reported at home and abroad. Thus the author suggests that free choice of food and a tablet of vitamin compound would be recommended in order to meet the divers' need.