Strain induced melt activation (SIMA) based on cold rolling and remelting method is used to prepare the rheological slurry, then with which axle bush parts of Cu alloy ZCuSn10P1 were prepared by rheological squeeze casting process. Whilst the effect of extrusion rate on the microstructure and mechanical property of the prepared copper alloy, and the evolution of solid and liquid phases during the forming process were studied. The results indicate that with the forming specific pressure of 250 MPa and extrusion rate of 15 mm/s, the microstructure of the prepared Cu-alloy ZCuSn10P1 is uniform and the synergy liquidity of solid-liquid is considerable, thereby, the tensile strength of the Cu-alloy reached a peak value of 371.1 MPa and elongation of 8.43%, which are 57.3% and 78.7% respectively higher than those of the Cu-alloy prepared by liquid-phase extrusion casting process. Furthermore, it is noted that liquid-phase segregation phenomenon along not only the vertical direction, but also the horizontal direction could be observed in the microstructure of the prepared axle bush parts by the rheological squeeze casting process.