The invention relates to the technical field of biological medical instruments, and particularly discloses a pipe head feeding mechanism in serum pipette welding equipment. The pipe head feeding mechanism comprises a machine frame and a second feeding mechanism; the second feeding mechanism comprises a second vibrating mechanism and a second material disc, wherein a second spiral conveying plate is arranged on the inner wall of the second inner disc part, the output end of the second spiral conveying plate is connected with a first arc-shaped conveying rail, the output end of the first arc-shaped conveying rail is connected with a second arc-shaped conveying rail, the output end of the second arc-shaped conveying rail is connected with a third arc-shaped conveying rail, the third arc-shaped conveying rail is composed of two arc-shaped rods, the output end of the third arc-shaped conveying rail is connected with a fourth arc-shaped conveying rail, and the output end of the fourth arc-shaped conveying rail is connected with a fifth arc-shaped conveying rail. The pipe head feeding mechanism has the advantages of being high in automation degree, high in production efficiency and low inproduction cost.