This production line consists of a flour vibration sifter, an egg peeler, a fast whipper, a single-drum iced water cold storage tank, an air inflator, an automatic multifunctional paste injector and an oven, and is designed for easier operation. The machine is suitable for large-size continuous industrial production, occupies a smaller area and provides all necessary functions, which is superior over conventional cake machines that involve heavy workload and closeout processes. The paste injector is an integrated automatic combination with the automatic pan placer, automatic paper holder arranger and multi-color paste injection, guaranteeing high accuracy for individual products