葡萄酒的釀造原理為：糖+酵母=酒精+二氧化碳，也就是說若要啟動發酵，必須有糖分的存在，而家庭自釀葡萄酒所采用的葡萄多為鮮食葡萄，葡萄表皮的酵母菌本身含量就不如釀酒葡萄，再加之為了清潔，在釀造前又洗去了大部分，因此若要發酵正常進行，壹般都會加糖。
自釀葡萄酒的步驟如下：
材料：新鮮的葡萄，白糖，容器。
第壹步，釀制葡萄酒所用的葡萄最好是新鮮的，把壞了的挑出來。
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第二步，用清水洗壹洗葡萄，然後放淡鹽水裏面泡半小時，然後再過壹遍水沖掉表面的鹽水。
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第三步，葡萄放在外面進行晾幹，不要把多余的水分帶進去。
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第四步，完成晾幹後把葡萄捏碎了放進容器裏，按照6斤葡萄1斤白糖的比例來放入白糖，然後攪拌均勻，蓋上蓋子密封好了。
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第五步，發酵的時間在夏季溫度高發酵壹周即可，在秋季溫度低的時節，需要發酵半個月。
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第六步，等發酵的時間到了以後，用濾網把葡萄過濾出來，剩下的裝進幹凈的容器裏。
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