In this paper, we study the biharmonic space-like submanifolds in the pseudo-Riemannian space form. By using moving-frame method and Hopf lemma, we prove that any pseudo-umbilical biharmonic space-like submanifold Mn is maximal, and show that if Mn is compact, then it is totally geodesic, which generalizes results in [5, 7].%本文研究了伪黎曼空间型中2-调和类空子流形的有关性质.利用活动标架法和Hopf原理,证明了伪脐2-调和类空子流形Mn是极大的,以及如果Mn是紧致的,那么Mn是全测地的,从而推广了[5,7]中的结果.
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