The type of ts and t is an important standard to make a distinction between mandarin and dialect.However,there is still no researcher who has ever made any conclusion on whether the northeastern mandarin was independent or not since China Languange Atlas(1987) to Study on Mandarin Chinese Dialects(ZengyiQian,2011).The author inferred we are necessary to face the fact that our modern northeastern mandarin and Beijing mandarin have already separated;and we are obliged to make efforts to explain the relationship of these two scientifically and rationally.This paper will focus on analyzing and interpreting the historical distribution of the complex types of ts、t■,t■(t■),ts/t■,ts,■/tθ/t∫/t■/ts/of zhi,zhuang,zhang groups in the dialect of Liaoning and even the northeastern mandarin by describing the dialect characteristics of zhi,zhuang,zhang including Jiao-Liao mandarin,northeastern mandarin and selecting the dialects of neighboring areas and phonology books to compare in the historical view so as to make a more clear show about the feature and difference of Liaoning mandarin and northeastern mandarin.