公式一:=index(sheet2!c:c,match($a2&$b2,sheet2!$a$1:$a$1000&sheet2!$b$1:$b$1000,))数组公式,按CTRL+SHIFT+ENTER结束右拉填充,下拉填充公式二:=vlookup($a2&$b2,if({1,0},sheet2!$a$1:$a$1000&sheet2!$b$1:$b$1000,sheet2!c$1:c$1000),2,)数组公式,按CTRL+SHIFT+ENTER结束右拉填充,下拉填充公式三:=sumproduct((sheet2!$a$2:$a$1000=$a2)*(sheet2!$b$2:$b$1000=$b2)*sheet2!c$2:c$1000)右拉填充,下拉填充