Abstract: The present disclosure relates to an oil barrel outlet nozzle, which comprises a fixed pipe, a closing mechanism slidably arranged therein, and an oil outlet pipe, which are connected through a rigid linkage structure. The linkage structure responds to the sliding of the oil outlet pipe to drive the movement of the closing mechanism while isolating the motion transfer between the two, ensuring that the sealing interface between the closing mechanism and the fixed pipe remains independent of wear on the oil outlet pipe. Through the O-ring seal between a sealing plate and a protrusion and the synergistic action of a pneumatic balancing device and a limiting mechanism, the sealing reliability and service life are significantly improved.