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桑天牛在我国北起辽宁的鞍山，南至海南岛，东从鞍山、西至云南省的沧源均有分布，分布在全国除黑龙江、吉林、内蒙古、新疆、青海、宁夏、西藏之外的所有２４个省、市、自治区。在我国分布北界为鞍山以南的辽南地区，从河北省秦皇岛到承德、张家口，沿太行山向南到山西省的临汾、陕西省关中地区及甘肃省的天水市，西南至四川的康定、西昌、云南的沧源，在此线以南、以东的广大区域皆为桑天牛分布区。其垂直分布，从３ｍ以下的林地到２６１６ｍ的高原山地皆有分布。
Morus alba in north China from Anshan in Liaoning, Hainan Island to the south, east from Anshan, Cangyuan in Yunnan Province are distributed in the west, located in the country except Heilongjiang, Jilin, Inner Mongolia, Xinjiang, Qinghai, Ningxia, Tibet All 24 provinces, municipalities and autonomous regions. In northern China, the northern boundary of Liaoning Province is located in the south of Anshan. From Qinhuangdao in Hebei Province to Chengde and Zhangjiakou, Linfen in Shanxi Province along the Taihang Mountains to the south, Guanzhong in Shaanxi Province, Tianshui City in Gansu Province, Kangding in Southwest China, Xichang, Cangyuan of Yunnan, south of this line to the east of the vast area are mulberry day distribution area. Its vertical distribution, from 3m woodland to 2616m plateau mountain are distributed.