The invention discloses a component design and preparation method for a zinc-aluminum alloy pipe. The zinc-aluminum alloy pipe comprises, by weight, 36.00%-69.00% of zinc, 31.00%-64.00% of aluminum, 0.01%-1.00% of copper, 0.01%-1.00% of magnesium, 0.01%-1.0% of tin, 0.01%-1.00% of silver, 0.01%-2.00% of titanium, 0.01%-0.50% of boron, 0.01%-0.70% of cerium and 0.01%-0.20% of praseodymium, and the sum of the weight percentage is 100%. The obtained zinc-aluminum alloy pipe can be used for manufacturing a mold and a pipe fitting in a complex shape and used for manufacturing a delay element in the civil explosive industry according to the component and performance differences, so that an existing lead-antimony alloy pipe which is severe in environmental pollution and toxicity is replaced; and meanwhile, zinc-aluminum alloy is light in proportion and cheaper than a copper alloy material, the cost can be obviously reduced, and the zinc-aluminum alloy pipe can be widely used in metallurgy, mines, light industry, food, chemical industry, printing, mechanical equipment and other fields.