作为热电材料 FeSb₂ 的姊妹材料，RuSb₂ 被广泛研究，但以前的工作主要集中在与 FeSb₂ 的比较上，尚未对 RuSb₂ 在压力下的性质进行深入研究。在本文中，我们研究了 RuSb₂ 在压力 下的性质，并探讨了其与 Ru 的磷族化合物 RuP₂ 和 RuAs₂ 之间晶体和电子结构的异同。我们 用晶体结构搜索方法结合第一性原理计算，发现该族化合物经历了一系列结构相变：（I）RuSb₂： Pnnm → I4/mcm → I4/mmm；(II) RuP₂：Pnnm → I4₁/amd → Cmcm；(III) RuAs₂： Pnnm → P-62m。新发现的五个相在高压下都是热力学和动力学稳定的，并表现出金属性。RuSb₂ 和 RuP₂ 的四个高压相在泄压到零压后动力学依旧稳定。我们计算得到 RuSb₂ 的 I4/mcm 和 I4/mmm 相以及 RuP₂ 的 I4₁/amd 和 Cmcm 相的超导转变温度在 0 GPa 时分别约为 7.3 K、 10.9 K、13.0 K 和 10.1 K。另外，RuSb₂ 的 I4/mcm 和 I4/mmm 相以及 RuP₂ 的 I4₁/amd 相还具有拓扑非平庸的表面态。我们的研究表明，压力是调节 Ru 的磷族化合物结构、电子和超 导性质的有效方法。

RuSb₂, as a sister material of thermoelectric material FeSb₂, has been extensively studied focusing on the comparisons with FeSb₂, however, the properties of RuSb₂ under pressure have not been surveyed thoroughly yet. In this work, we studied the properties of RuSb₂ under pressure and explored the similarities and differences of crystal and electronic structures between the Ru-pnictides partners RuP₂ and RuAs₂. Using the crystal structures search method together with first-principles calculations, we found that this family undergoes a serial of structural phase transitions: (I) For RuSb₂: Pnnm → I4/mcm → I4/mmm; (II) for RuP₂: Pnnm → I4₁/amd → Cmcm; (III) for RuAs₂: Pnnm → P-62m. The newly found five phases are all energetically and dynamically stable at high-pressure and exhibit metallic properties. The four high pressure phases of RuSb2 and RuP2 can be quenched to zero pressure. The superconducting transition temperatures of I4/mcm and I4/mmm phases of RuSb2 and I4₁/amd and Cmcm phase of RuP₂ are predicted to be approximately 7.3 K, 10.9 K, 13.0 K, and 10.1 K at 0 GPa, respectively. In addition, the I4/mcm and I4/mmm phases of RuSb₂ and the I4₁/amd phase of RuP₂ exhibit non-trivial topological properties. Our studies illustrate that pressure is an effective way to tune the structural, electronic, and superconducting behavior of the Ru-pnictides compounds.