The home town lies in the southeast end of Miaoshu county, the Northeastern side connects with Hsinchu county; The south and Taichung are a circle; The west, large lake township, Zhuo LanZhen are the neighbor; Connect lion's pool township, south village township in the north, the whole area is about 614.5127 sq. km., for the villages and towns biggest in area of Miaoshu county, account for the whole county more than 1/3 the whole area, domestic to rise and fall while being alpine, have more and more higher terrains from west to east, elevation low meter on four sides most, have 3500 higher about most, there are very few platforms, the mountains and rivers are separated , the traffic is extremely inconvenient. The west slope that the township of Tai-An lies in the snow-covered mountain and mountain range, the west of the terrain is high the east is low, the elevation, such as snow-covered mountain, big snow-covered mountain, large sharp mountain of hegemony on the county  circle, etc. are above 3,000 meters, the high mountains of 2,000 meters spread all over and the township, the high mountain and deep valley, grand, the majority is the area under one's jurisdiction of garden village of plum, account for 2/3 of area of the whole township , it is the remaining natural forest zone in the west of the central mountain range . It is large for Anxi and behind rise in home town of dragon small stream, last watershed two basin, the large basin of Anxi accounts for 3/4 of area of the whole township; And then two main sources visited on the dragon small stream; Wen water and small stream, big lake small stream, rise in a mountain of deer and the east and wash water and mountain separately, tableland of river steps of two sides larger Anxi is wide gentlely, and become quintessence of the township of Tai-An.