Abstract: On the basis of field survey, with collected previous data, the authors divide the geotectonics of Myanmar into 5 first-ordered tectonic units, including 10 second-ordered tectonic units. They are, from west to east, 1) West Kachin-Pakhine suture zone (E-N₁) (Ⅰ), with Chin-Pakhine suture zone (E-N₁) (Ⅰ₁) and West Kachin suture zone (E-N₁) (Ⅰ₂);2) West Myanmar-Pulau Sumatera arc basin system (E-N₁) (Ⅱ), with Monywa-Pathein island arc belt (E-N₁) (Ⅱ₁), Shwebo-Yangon back-arc basin (E-N,) (Ⅱ₂) and Myitkyina back-arc basin (E-N₁) (Ⅱ₃);3) Tengshong-Kra Peninsula orogenic belt (T₃-K) (Ⅲ), with Bhamo continental marginal arc (T₃-K) (Ⅲ1), Mawiamyine continental marginal arc (T₃-K) (Ⅲ₂) and Tanintharyi block (P_z2) (Ⅲ₃);4) Baoshan-Shanbang landmass (€-T₂) (Ⅳ);and 5) Changning-Menglian-Chiang Let suture zone (C-T₂) (Ⅴ). The tectonic units are bounded by 9 faults, which, from west to east, are:Naga Yoma-Rakhine Yoma thrust fault (F₁), Pinlebu-Pye extensional faults (F₂), Sagaing-Bago dextral strike-slip fault (F₃), Putao-Kadu thrust fault (F₄), Ringhkung-Phamo extensional faults (F₅), Namhkam-Mogok dextral strike-slip fracture (F₆), Mandalay-Bago sinistral strike-slip fracture (F₇), Xidang-santa sinistral strike-slip fracture (F₈) and Mong Ping-Chiang Mai thrust fault (F₉).