Adjustable spanner of ratchet wheel

The utility model discloses an adjustable spanner of a ratchet wheel, and belongs to the technical field of a hardware tool. The middle of a wrench handle is in a hollow shape; two symmetrical arc plates are arranged at the front end of the wrench handle; a pawl is arranged in the middle of the two arc plates; the two arc plates are hinged by a hinge shaft; the front end of the pawl is clasped inside a tooth plate of the ratchet wheel; guide blocks are arranged at the front ends of the two arc plates and are inserted into a slide chute of the ratchet wheel; the slide chute on the ratchet wheel rotates along the guide blocks; one end of a driving end is riveted on the ratchet wheel; and a neck is arranged at the other end and clamped at the inner side of the ratchet wheel. The size dimension of the spanner can be conveniently adjusted; the work efficiency is improved; and the adjustable spanner is small in weigh and convenient to carry.