The invention relates to a convenient and fast pipe wrench. The convenient and fast pipe wrench comprises a movable wrench handle, a first movable wrench head vertically and fixedly arranged at the head end of the movable wrench handle, an adjusting wrench handle and a first fixed wrench head vertically and fixedly arranged at the head end of the adjusting wrench handle; the adjusting wrench handle is provided with a U-shaped groove, an adjusting frame is arranged in the U-shaped groove in an internally-molded manner, and a worm is transversely arranged in the adjusting frame; a rotation handle is arranged at the tail end of the adjusting wrench handle and connected with the worm through a connecting rod arranged in a sliding groove; the movable wrench handle transversely penetrates the adjusting frame and is located above the adjusting wrench handle, and teeth matched with the worm are transversely arranged on the lower side wall of the movable wrench handle; and the movable wrench handle is driven by the worm to transversely move. The convenient and fast pipe wrench has the beneficial effects that the structure is simple, use is convenient, pipes can be rapidly clamped by a wrench opening, slipping can be prevented, and the convenient and fast pipe wrench is suitable for machining the pipes with various pipe diameters.