=lookup(1,0/(sheet1!a$1:a$1000&sheet1!b$1:b$1000=a1&b1),sheet1!c$1:c$1000)PS:公式给出sheet1一共1000行,可以修改为实际值。公式在sheet2的C1输入,下拉填充。如果sheet2从第二行开始就改为=lookup(1,0/(sheet1!a$1:a$1000&sheet1!b$1:b$1000=a2&b2),sheet1!c$1:c$1000)