The objective of this study was to investigate silage vegetable soybean pod on milk yield, milk composition and blood biochemical index of lactation dairy cows. Twelve Holstein cows were divided into three groups by random block design. Control group cows were fed the original diet and feeding of the cattle farms. Cows were fed with diets content 6kg and 9kg silage vegetable soybean substitute of 1.5kg and 2.5kg alfalfa for group 1 and group2. The results showed that milk yield, milk composition and blood biochemical index were not significant. Compared to that control group, the cost for 0.08yuan and 0.14yuan every 1 kg 4% fat corrected milk in experimental group were saved.Mixed storage with vegetable soybean pod can be seen as a good feed and can alternative alfalfa.%本试验旨在研究菜用大豆荚壳混合青贮饲料对奶牛产奶量、乳品质和血液生化指标的影响。试验选取12头体况、产奶量、泌乳天数相近的奶牛，随机分为3组。对照组奶牛按牛场原有日粮和饲喂方式饲喂；试验Ⅰ组用6kg豆英混合青贮饲料替代1．5kg苜蓿干草，试验Ⅱ组用9kg豆荚混合青贮饲料替代2．5kg苜蓿干草，其他均不作变动。结果表明：混合豆荚青贮饲料代替部分苜蓿干草对奶牛产奶量无显著影响，对乳蛋白、乳瞒率、乳糖、非脂固形物和血液生化指标无显著影响。以产1kg标准乳计，试验Ⅰ组和Ⅱ组可分别节约饲料成本0．08元和0．14元，可见利用混合豆荚青贮饲料替代部分苜蓿干草饲喂奶牛经济、可行。
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