The invention discloses a precise glue-injecting nozzle, belonging to the technical field of precise injection molding of products. The precise glue-injecting nozzle comprises a nozzle, a glue-injecting mechanism connecting block, a valve needle and a valve needle driving mechanism, wherein an inner nozzle cavity is arranged in the nozzle; a nozzle hole is formed in the front end of the nozzle; the glue-injecting mechanism connecting block is provided with a raw material inlet; a channel allowing the inner nozzle cavity to be communicated with the raw material inlet is arranged in the valve needle; the front end of the valve needle is provided with a tip; and the valve needle driving mechanism can drive the valve needle to carry out reciprocating motion and to open or close the nozzle hole via the tip. Since the precise glue-injecting nozzle employs the valve needle with a hollow structure, a raw material can enter the inner nozzle cavity through the channel in the valve needle, and the raw material in the inner nozzle cavity is always communicated with the raw material in the raw material inlet, so the raw material in the inner nozzle cavity is always in a full state and is not changed in volume in a closing mode; thus, the precision of a glue injection amount is guaranteed, errors in output glue amounts are reduced, and the purpose of ultra-precise injection is achieved.