With the help of BP neural network's non-linear mapping ability and self-adaptive ability, the complex non-linear relationship between yarn quality and raw cotton quality and key process parameters can be well mapped, but BP neural network requires a large amount of sample data for training.With the help of BP neural network's non-linear mapping ability and self-adaptive ability, the complex non-linear relationship between yarn quality and raw cotton quality and key process parameters can be well mapped, but BP neural network requires a large amount of sample data for training.