The piezoelectric ceramic transducer with automatic frequency compensation circuit has a strong and stable output. The whole machine adopts a motor electric lifting system, which is convenient for adjustment. It adopts a horizontally adjustable welding head structure, making mold adjustment convenient. It adopts square columns and dovetail groove structure, which makes the machine position less likely to shift and ensures accurate positioning. Main applications: toys, stationery, household appliances, electronics, communications, transportation, packaging, daily necessities