The utility model discloses a can dismantle cell -phone protective sheath of change, respectively being provided with near the base position and supplying bottom male slot at the frame casing of four sides of cell -phone and the bottom that is used for protecting the cell -phone back, the left and right both sides limit inner wall of frame casing including encircling the cover, a tip of slot is provided with the stopper and forms the cavity that holds the cell -phone for block bottom, bottom through inserting slot and frame casing. The utility model discloses a cell -phone protective sheath, the user can be according to individual hobby, and freedom disassembly changes the drain pan of different kinds of, material, line, has both solved the single not removable problem of cell -phone protective sheath outward appearance, has reduced the cost of spending of changing the cell -phone protective sheath again.