| This paper consists of Introduction, Chapter 1, Chapter 2, Chapter 3, Chapter 4, Conclusion, References, Appendix, and so on. On the basis of the theory of phonology, this paper uses the acoustic analysis method to describe Dawur phonetic system, and has reached the following conclusions.The Dawur language has 5 short vowel phonemes (/A,a,i,o,u/),5 long vowel phonemes (A:,a:,i:,o:,u:/),6 diphthongs (/Ai,(?)i,oi,ui,A,(?)u/),18 basic consonant phonemes (/p,ph,t,th,k,kh,t∫,t∫,s,∫,x,m,n,l,r,j,w,f/),11 palatalized consonant phonemes (/pi,ph,tj,thk,kj,khj,lj,mj,nj,rj,(?)/) and 12 labialized consonant phonemes (/tw,thw,kw,khw,t∫w,t∫hw,sw,∫w,xw,lw,mw,nw/). These phonemes are read as 11 short vowels,6 long vowels,13 compound vowels,29 basic consonants,13 palatalized consonants and 12 labialized consonants.Main views proposed by this paper are as follows:The short vowel [e] of Dawur language is a variant of the phoneme /i/;the long vowel [e:] is a variant of phoneme /i:/.According to the length and intensity, vowels of Daur language can be divided into two categories of high and non-high vowels. High vowels (i and u) are shorter and weaker, while non-high vowels (A, (?) and o) are longer and stronger. According to the distribution characteristics of consonants in words, consonants can be divided into two natural groups: vocalic consonants and consonantal consonants. Vocalic consonants mainly appear in the coda of syllables, and act as the front consonants of consonant clusters; Consonantal consonants are mainly at the onsets of syllables, which can serve as post-consonants of consonant clusters.The main acoustic manifestations of palatalized consonants are the higher second formant and i-like glide appearing in the front and back, and the main physiological manifestation is accompanied by raising the tongue dorsum. The main acoustic manifestations of labialized consonants are the lower second formant and u-like glide appearing in the front and back, and the main physiological manifestation is the accompanying lip-rounding movement.The geminated consonants are the significant phonetic features of Bathan dialect of Daur language. They appear in the boundary of syllables and combine closely without entraining vowels between them. There are mainly several kinds of geminated consonants such as [1/1], [m/m], [n/n], [(?)], [s/s], [t/th], [k/kh] and so on, among which the vocalic geminated consonants are more common.The conditional sound changes like short vowel weakening at the end of words, long vowel shortening in non-word-initial syllable, vowel nasalization with nasal coda at the end of the words and front nasal backening are the important sound change phenomena of Daur language. Besides, the variants of vowels in tongue positions and the variants of consonants in the method of articulation in Daur language are all defined as free variants. Although the variants appear in certain conditions, not all phonemes change in the corresponding conditions. There are mainly advancing in vowels, and variants such as fricativization, unvoiced, voiced variants in consonants.We can differentiate the 10 vowel phonemes and the 41 consonant phonemes in Daur language by the 12 distinctive features, respectively as +/-vocalic,+/-consonantal, +/-discontinuous,+/-continuant,+/-strident,+/-nasal,+/-aspiration,+/-compact,+/-difruse, +/-flat,+/-sharp,+/-long, and so on.There is a pitch accent at the ending syllable in Daur language, which is manifested in a noteworthy fall following a noteworthy rise of the word’s pitch. The pitch accent does not have the function of differentiating word meanings but word boundaries.The vowel harmony in Daur language is manifested in tongue position (high or low) harmony and labial harmony. Tongue position harmony is shown in harmony between low vowels and harmony between high vowels. Labial harmony only appears on the two short vowels A and o which are in the non-first syllables.A only appears after A and o only appears after o. The emergence of the following two phenomena has started to destroy the harmony rules of Daur language, which is that (1) the low vowel A:and high vowel u:can appear in the same word and (2) the non-initial short vowels (?), i, u can appear after any vowels.The syllable structure in Daur language is onset-nuclear-coda with 11 types of syllables, among which CV and CVC are the most important ones.
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