文章认为,门隅地方古代史是我国西藏地方史的一个组成部分,在与西藏地方史一道融入中华民族整体发展史的进程之中,达旺成为门隅政治、宗教、文化中心。英国入主阿萨姆后在相当长时期内沿袭了沿喜马拉雅山南侧坡脚的传统习惯线。1910年英属印度提出战略边界计划,谋图将传统边界线北移至山脊,目的在于建立封锁印度民族解放运动的防火墙。英国对战略边界在达旺地区的走向多次修改,但根本目的没有改变,是在不同形势下出于维护对印度殖民统治需要而做出的扩展或收缩的调整,战略边界计划及有关活动是英国单方面作为。直至1951年中国西藏地方政府仍然对达旺进行有效治理。 The article holds that the ancient history of Mengyu is an integral part of the local history of Tibet in our country. With the integration of local history in Tibet into the overall development history of the Chinese nation, Tawang became the political, religious and cultural center of Mengyu. For a long time, Britain had followed the traditional habitat along the southern slope of the Himalayas for a long time. In 1910, British India proposed a strategic boundary plan and attempted to move the traditional boundary line northward to the ridges in order to establish a firewall blocking the national liberation movement of India. The British revision of the strategic boundary in the Tawang area has been revised many times without any change in its fundamental purpose. It is a readjustment of expansion or contraction under different circumstances for the purpose of maintaining the colonial rule in India. The strategic boundary plan and related activities are Britain acts unilaterally. Until 1951, the local government of Tibet in China still effectively controlled Tawang.