In-situ β phase/Zr 56.2Ti 13.8Nb 5.0Cu 6.9Ni 5.6Be 12.5 BMG （bulk metallic glass composites ）composites were prepared by low pressure casting combining with water-cooling copper mould and by the melt water-quenching method,respectively.The microstructure and ambient compressive properties of the composites were investigated.It is revealed that the microstructure characteristics of the composites,including the volume fraction,morphology and size of β phase,sensitively depends on the processing conditions.Lower cooling rate can result in the formation of more and coarser β phase,in which different preparation methods,sample shapes and size can lead to different cooling rate.Ambient compressive properties of the composites are controlled by microstructural characteristics,where more and coarser β phase can significantly improve the macro-plasticity of the composites.