The lattice that can be divided by two convex sublattices are studied,and some basic properties are given.Some other cases that help us find what kind of lattices has prime ideals are discussed.

• 主要研究能被双凸子格分划的格的基本性质；并得出它和存在素理想的格是等价的；给出了一些特殊的能被分划的格.