The invention discloses an iron support with wind-preventing and fire-extinguishing functions. The iron support comprises a base, a support rod, an iron ring and an iron clamp, wherein the base is fixedly connected with the support rod; the support rod is connected with two lifting devices in a sliding manner; the lifting device is provided with an adjusting knob; the side end of the lifting device is fixedly connected with a cross rod; the cross rod is fixedly connected with the iron ring and the iron clamp separately; the iron clamp is arranged above the iron ring; a baffle plate is arranged at the outer side of the base in a surrounding manner; the baffle plate comprises a fixed plate and a movable plate; the movable plate is sleeved with the fixed plate in a sliding manner; height adjusting holes are uniformly formed in the fixed plate; locking pins are arranged in the height adjusting holes; the lower end of the cross rod is fixedly connected with and provided with a small sand box; and a material guide pipe is downwards exported from the small sand box. Through the iron support, timely fire-extinguishing treatment can be carried out when an alcohol lamp catches fire accidentally while heating a vessel.