The injection and extraction system of Charge Stripping Injection(CSI) and 1 Charge Stripping Injection of HIRFL-CSR progressed steadily in slow extraction of CSRm, design and 2001. The progress covers design development of components.For beam accumulation schemes of CSRm, besides of Multiple Multi-turn Injection(MMI) and RF Stacking(RFS), Charge Stripping Injection(CSI) is designed for accumulation of light ions(C~Ne). It’s well known