The invention relates to a short flow preparation method for a copper-clad aluminum composite wire, relating to bimetal layered composite wire materials. The preparation steps are as follows: groove rolling of copper-clad aluminum composite blanks after horizontal continuous casting composite formation is performed; the rolling speed range is 30 to 1200 meters per minute; the single-pass section scalage is 10 percent to 50 percent; when the multi-pass rolling total deformation reaches 70 percent to 99 percent, intermediate annealing is performed on the copper-clad aluminum composite materials; the annealing temperature is 150 to 450 DEG C; the annealing time is 0.5 to 3 hours; multi-pass drawing processing is performed on wire stocks after rolling formation; the single-pass section scalage is 10 percent to 30 percent; the drawing speed is 1 to 20 meters per minute; intermediate annealing can be implemented as required; the annealing temperature is 100 to 400 DEG C; the annealing time is 0.5 to 1 hour. The invention obviously shortens the technological flow and greatly reduces the production cost; moreover, the prepared composite wire has superior interface quality.