The invention relates to a screwdriver for use in power maintenance, in particular to a multifunctional screwdriver integrating ranging and air speed measurement, and aims to solve the problems of incapability of accurately positioning the screw depth and single function in the conventional screwdriver. The multifunctional screwdriver comprises a handle and a tool bar integrated with the handle, wherein the side wall of the tool bar has scales; the back end face of the handle is provided with an embedding hole; an air meter sliding in the embedding hole is arranged in the embedding hole. The multifunctional screwdriver is reasonable and reliable in structural design, the screw depth can be accurately positioned, and the air speed can be measured conveniently and rapidly; the multifunctional screwdriver has the advantages of simple structure, convenience in processing and low cost.