The invention discloses a preparation method for aluminum tin bearing bush alloy, belongs to the technical field of aluminum-based bearing bush alloy materials and provides a preparation technology containing smelting, strip throwing, rolling and other processes. The amorphous aluminum tin alloy is obtained mainly through smelting and section throwing, and then an aluminum tin bearing bush alloy product uniform in structure and small in grain is obtained through rolling and punch forming. Through the preparation method, production can be organized on existing equipment, and equipment investment is small. Meanwhile, through accurate control over the rolling process, a microstructure small and uniform in grain can be obtained, and stability of abrasion resistance and comprehensive performance of the aluminum tin alloy is improved.