研究了新型高强度镁合金ＭＢ２６超塑性拉伸、压缩的变形行为。结果表明，热挤压态ＭＢ２６合金不经过任何预处理即具有很好的超塑性。超塑性拉伸时，在４００℃、ε０＝１．１７×１０－２ｓ－１的变形条件下δ＝１４５０％，σ＝８．７ＭＰａ，ｍ值为０．６；超塑性压缩时，在４００℃、ε０＝８．３×１０－３ｓ－１变形条件下，压缩真应变ε高达２．１８以上，σ＝１８ＭＰａ，ｍ值在０．４以上。 The deformation behavior of the new high strength magnesium alloy MB26 under tension and compression was studied. The results show that hot-pressed MB26 alloy has good superplasticity without any pretreatment. In the superplastic stretching, δ = 1450%, σ = 8.7 MPa and m value 0.6 at 400 ° C under the deformation condition of ε0 = 1.17 × 10 -2 s -1. When the superplastic compression is performed at 400 ℃, ε0 = 8.3 × 10-3s-1, the true compressive strain ε is as high as 2.18 or more, σ = 18MPa and m is 0.4 or more.