Universal hardware machining clamp convenient to adjust

The utility model belongs to the technical field of hardware machining clamps, and particularly relates to a universal hardware machining clamp convenient to adjust, which comprises a base, a first clamping block arranged on the base, a second clamping block arranged on the base and far away from the first clamping block, a fixed block arranged on the base, a threaded rod arranged in the fixed block, and a threaded rod arranged in the threaded rod. A fixing button is arranged at one end of the threaded rod, an extending plate is arranged in the first clamping block, a second inserting groove is formed in the second clamping block, a fixing groove is formed in the upper surface of the base, and a strong magnet is arranged in the fixing groove. By means of the extending plate and the second inserting groove, when small hardware is clamped, the extending plate can be used as a bottom supporting base for the small hardware, so that the bottom of the small hardware is supported, it can be guaranteed that the small