鲁中莱芜方言“XX子”式子尾词分属于两种重叠类型——构词重叠和构形重叠。“XX子”式子尾词的第一个“X”读原调,第二个“X”和“子”都读轻声。“XX子”式子尾词具有表小称、表多量、表少量、表泛指、表特指和表描写等语法意义。在语法功能上,名词性的“XX子”式子尾词可以做主语、宾语和定语;量词性的“XX子”式子尾词只能做定语。在色彩意义上,“XX子”式子尾词一般为中性。最后文章探讨了“X子”重叠为“XX子”式子尾词的依据。 Luzhong Laiwu dialect “XX child ” type subheadings belong to two types of overlap - word formation overlap and shape overlap. The first “X” of the “XX sub” suffix reads the original note and the second “X” and “” sub “read softly. ”XX child “ type suffix has a small table, a large number of tables, a small number of tables, table refers to the table refers to the table and grammar meaning. In the grammatical function, the noun ”XX sub“ suffix can be the subject, object and attribute; quantifier ”XX sub“ suffix can only be done attributive. In the color sense, the ”XX sub“ end of the word is generally neutral. Finally, the article explores the basis for the ”X sub“ overlapping as the ”XX sub" ending.