A continuous rotory canning packaging machine based on PLC was designed and developed. An automatic tracking feeder with reciprocating swing and automatic tracking empty cans functions was equipped in this canning packaging machine. When empty cans make continuous circular motion with the rotation of the filling disk, the automatic tracking feeder make reciprocating swing, and successively put the quantitative weighing product into empty can through the feeding tube. The machine solves the impact and low efficiency problem caused by the intermittent motion of filling dish in traditional canning packaging machine, and in addition improves performance and efficiency of canning packaging machine.