The invention discloses a mechanical tool clamp convenient to control. The mechanical tool clamp comprises a shell and a clamping block, three screw rods are movably connected with the interior of theshell around the axis of the shell, spiral sleeves are all arranged on the three screw rods in a sleeved mode. According to the mechanical tool clamp convenient to control, the rotating knob is rotated, the rotating shaft drives the first bevel gear to rotate together, the gear disc is driven to rotate through the first bevel gear, three the second bevel gears are driven to rotate synchronously through the gear disc, so that the three screw rods rotate together, synchronous rotation of the three screw rods is achieved, so that the three clamping blocks are gradually close to the workpiece direction, and finally the clamping work is completed the rotating direction of the rotating button is changed, the three clamping blocks can be controlled to be separated or close to each other, and thepurpose of controlling the clamping by one knob is achieved, convenient to control, simple in structure, convenient to operate, stable and reliable in fixing effect, and capable of effectively improving the working efficiency.