研究了环Z4+uZ4+u2Z4,其中u3=0.根据环Z4+uZ4上负循环码的结构,研究了环上Z4+uZ4+u2Z4长度为2k的负循环码.利用环同态,给出了环Z4+uZ4+u2Z4上长度为2k的负循环码的结构.