Biological instrument pipeline cleaning liquid and preparation method thereof

The invention relates to a biological instrument pipeline cleaning liquid capable of dissolving and removing protein molecules attached on a pipeline inner wall and a preparation method thereof. The biological instrument pipeline cleaning liquid comprises the components by the mass percentage: 0.5%-1% of tris(hydroxymethyl)aminomethane (Tris) as a component I, 0.2%-0.5% of beta-cyclodextrin as a component II, 0.2%-0.5% of epsilon-polylysine as a component III, 0.5%-1% of sodium deoxycholate as a component IV, and 97%-98.6% of purified water as a solvent and as a component V. The biological instrument pipeline cleaning liquid has the advantages: firstly, the cleaning liquid has obvious cleaning effect on protein residues in plastic, ceramic, metal and glass pipelines, the pipeline inner surface is not hung with water drops and has no liquid residues after cleaning, and influence cannot be caused on subsequent pipeline use; secondly, the cleaning liquid has no corrosion to the plastic, ceramic, metal and glass