Abstract: The extrusion tests of Al-Mg-Ga-In-Sn soluble aluminum alloy cast slab were carried out by using different extrusion ratios, and optical microscope（OM）, scanning electron microscope（SEM）, tensile test at room temperature and electrochemical workstation were used to study the effect of extrusion ratio on the microstructure and properties of the alloy.The results show that with the increase of extrusion ratio, the grain size of the alloy is refined from 114 μm to 57 μm, and the size of the second phase gradually decreases, the shape of the second phase changes from dendritic to granular, and its distribution is gradually uniform; the tensile strength and corrosion rate of the material increase at first and then decrease.When the extrusion ratio is 7.1, the tensile strength reaches the maximum value of 279 MPa and the corrosion rate reaches the fastest value of 1.74 mm/h. It provides theoretical and experimental basis of this material in the development of new downhole tools of tight oil and gas development.