The invention provides a rolling preparation method for improving the interface bonding strength of a lamellar aluminum-titanium composite through nano-metal powder. According to the rolling preparation method, a titanium alloy strip material and an aluminum alloy strip material are machined to be at the same dimension, surface treatment is conducted so as to remove surface oxides, nanometer particles are arranged on the treated surfaces, stacking is conducted, so that a titanium/aluminum composite strip material is obtained, vacuum edge welding is conducted on the titanium/aluminum compositestrip material, a pulse current is exerted to the welded titanium/aluminum composite strip material so as to enable the nanometer particles and a local area of the surface of the composite strip material to conduct electric discharge, and surface metal is molten; then, rolling is conducted on the titanium/aluminum composite strip material, and material interface welding bonding is achieved; and finally, rolling continues until the total reduction rate of the strip material reaches 80%-95%. By the adoption of the rolling preparation method, the high-performance titanium/aluminum composite stripmaterial can be prepared. The plate material has the potential to be applied to the bulletproof protection field, the aerospace field, the sound insulation and noise reduction field, the automobile weight reduction field and the like. The rolling preparation method may be used for preparing composite strip materials composed of other nonferrous metal materials such as copper and magnesium in thefuture.