The invention discloses an anesthetic needle that is convenient for continuous injection; the anesthetic needle comprises a needle head, a syringe, a push rod and a piston; one side, close to the needle head, of the syringe is sleeved with a support sleeve that is in a transparent cylindrical structure; a second end face of the support sleeve is connected on the side wall of the syringe; the support sleeve side wall is a telescopic rubber structure; a first end face of the support sleeve is a flat structure, and provided with a mating hole that allows the needle head to penetrate. When long time anesthetic injection is needed, the first end face of the support sleeve can be directed attached to the skin, so the mutual contact pressure between the support sleeve and the skin can improve theneedle head stability in injection, thus reducing high hand concentration in long time continuous injection of the doctor, assisting the doctor to position and stabilize the needle head, and realizing long time continuous injection; the support sleeve is designed in a visual transparent structure and telescopic structure, so the doctor can conveniently observe the injection status and control theneedle head insert depth.