The invention relates to the field of meat product processing and provides a secondary baking system and method so as to solve the problems that the processing cost of jerky food is high and the food is contaminated easily at present. The system comprises a low-temperature baking oven and a high-temperature baking oven arranged beside the low-temperature baking oven. The low-temperature baking oven comprises an oven body, a heating room and a baking room. The heating room and the baking room are separated through a partition plate. The baking room and the heating room are communicated through an air return pipeline. The high-temperature baking oven comprises an oven body, a baking sieve and an evaporation pipeline. According to the technical scheme, the production cost of jerky can be reduced, and contamination can be avoided.