Pretace Comems Notations Introduction Part Progression Part Ⅰ.On general case Introduction Chapter 1.Summary on Profinite groups Chapter 2.On the solvability in finite local extensions Chapter 3.Absolute groups Chapter 4.On AbhyankarS Lemma Part Ⅱ.Some finite maximal extensions of local fields Chapter 5.Standard over-finiteextensions Chapter 6.Embedding of an extension in its galois closure Part Ⅲ.Normality Criteria Chapter 7.On the OreKrasner equation Chapter 8.Normality Criteria through Eisenstein polynomials,Qp case Part Ⅳ.Complements on Algebra and local fields Chapter 9.Various standard facts on Algebra Chapter 10.On extensions of local fields Chapter 11.Some words on local class field theory Bibliography Terminological Index 编辑手记