Arterial blood gas needle capable of preventing blood splashing and rapidly exhausting

The utility model relates to the technical field of medical instruments, and particularly discloses an arterial blood gas needle capable of preventing blood splashing and rapidly exhausting, which comprises a push rod and a needle cylinder, the front end of the push rod is connected with a piston, an air filter is arranged in the piston, the front end of the needle cylinder is connected with a needle seat, and a steel needle is fixedly arranged on the needle seat. A hollow cover cap is arranged at the end, away from the push rod, of the piston, the cover cap comprises a vertical annular face and a circular truncated cone face, the vertical annular face is kept consistent with the piston body in the vertical direction, and a plurality of blood gas channels leading to the interior of the piston are formed in the side portion of the vertical annular face. The design structure is reasonable, through arrangement of the piston caps in different forms, the blood splashing prevention effect is improved, the safety of