The present invention discloses a high-intensity texture copper-nickel/nickel-tungsten alloy double-layered composite base band and a preparation method thereof. The preparation method comprises the following steps: conducting high-temperature forging and hot-rolling on a copper-nickel alloy, of which the percentage content of copper atoms is 46%, acquired from smelting to obtain billets; defining the billets as A; defining nickel tungsten mixing powder, of which the percentage content of tungsten atoms is 12%, as B; placing the A and the B in a mould layer by layer; adopting electric discharging plasma for sintering to obtain copper-nickel/ nickel-tungsten double-layered composite billets; conducting cold-rolling on the obtained composite billets to strips, of which the thickness is 40 Mum; conducting recrystallization heat treatment on the cold-rolling composite base band at a high temperature; and finally obtaining the high-intensity ferromagnetism-free strong cubic texture copper-nickel/nickel-tungsten alloy double-layered composite base band.