The stable type valve machining tapping device capable of preventing the chippings from splashing comprises a base with a supporting function, a tapping table, a dust suction device, a clamping mechanism, a limiting mechanism, an adjusting mechanism and a dust suction box, the tapping table is arranged above the base, and the dust suction device is installed on the left side of the base; the clamping mechanisms are arranged at the upper end of the tapping table at equal angles, the limiting mechanism is arranged above the connecting plate, the adjusting mechanism is arranged below the bearing block, and the lower end of the dust suction box is fixedly connected with a chip removal cylinder. According to the stable type valve machining tapping device capable of preventing the chippings from splashing, valves of different sizes can be clamped and limited conveniently, the valves are prevented from loosening in the tapping process, the fastening effect is good, the valves can be tapped in batches conveniently, the valve tapping efficiency is greatly improved, and the practicability is high. And in addition, chippings generated in the tapping process can be conveniently collected and cleaned, and the chippings are prevented from splashing and collapsing.