The utility model discloses an oil -well cement stone maintenance module includes the first module body of T font, two the second module body, base, apron and four bolts of buckling and being 90 jiaos, wherein, the first module body of T font and two the second module bodies that are 90 jiaos of buckling can enclose into a cube, are equipped with base and apron respectively through top and bottom, form an airtight fixed cell body after making the whole equipment of oil -well cement stone maintenance module fixed, prevent to take place displacement between the module among the maintenance process better fixed module, the life of extension cement stone module, reasonable in design, convenient operation.