The model is mt12000c semi-automatic cover machine, based on the improved model. It is mainly suitable for the production of thick quilt in southern provinces of China. The quilt can be made automatically around (including quilt head, quilt tail and two longitudinal edges) At the same time, the machine can also produce standard quilt with the same thickness around and in the middle. Using computer program operation, the thickness of quilt head and quilt tail can be adjusted.