The utility model discloses an anti-theft and anti-dripping drilling sleeve cap which belongs to the technical field of oil exploitation. The anti-theft and anti-dripping drilling sleeve cap is characterized in that a limiting ring is fixed on an outer panel of the sleeve cap; a protective hood is arranged on the periphery of the limiting ring; a sleeve with a screw thread is matched with the protective hood via a thread; a limiting sheet is fixed inside the sleeve with the screw thread, and a rectangular rotating shaft is fixed with a separation blade through the limiting sheet. The anti-theft and anti-dripping drilling sleeve cap has the beneficial effects that the tool can be used when a hole is empty in oil-extraction workover treatment after oilfield drilling is finished, and the anti-theft and anti-dripping drilling sleeve cap can prevent litter from falling into the sleeve, can protect sleeve coupling, and also has an anti-theft function. The anti-theft and anti-dripping drilling sleeve cap has the advantages of rational structure, simple process, low cost, convenience for operation, strong practicability, first prevention and significant effect.