The invention discloses an adjustable guide wheel, and relates to an improvement on an aluminum electrolysis multifunctional crane tool guide wheel structure, and aims to automatically eliminate a gap between a guide wheel and a guide rail, ensure stable running of a lifting component, prolong the service life of the guide wheel and relieve the labor strength of maintainers. The adjustable guide wheel comprises a guide wheel base, wherein the guide wheel base is provided with a concentric guide wheel through a concentric shaft; an eccentric guide wheel is arranged through an eccentric shaft. The adjustable guide wheel is characterized in that the eccentric shaft is connected with a support plate; a guide rod is hinged to the guide wheel base; the guide rod is provided with a guide block through a thrusting spring; the support plate is connected with the guide block; the elasticity of the thrusting spring is used for pushing the guide block to make the support plate drive the eccentric shaft to rotate.