This article provides a comprehensive morphological study on the Manchu ‘n-type stem’. ‘n-type stem’ refers to verb stems that end with the consonant n. This article discusses the formation and distribution of a series of allomorph such as ‘-mbu’, ‘-kA/-ngkA’, ‘-ndArA’, ‘-kiyA’, ‘-niyA’, ‘-pi/-mpi’, which are diachronically caused by ‘n-type stem’. This article discusses the lexical composition of ‘n-type stem’ and points out that ‘n-type stem’ includes both simplexs and compound words(which formed through the affixes ‘rAn’, ‘cun’ ‘liyan’, ‘šan’), and some words in ‘n-type stem’ are most likely to be Chinese loan words. In addition, through the reconstruction of “n-type stem”, there will be more corresponding for noun and verb can be determined as zero derivation.