Special stabilizer with reamer and back-reamer is an important tool in the drilling engineering to prevent well deviation. Apply to stabilize drilling tools in the drilling process of oil, gas and geological exploration. It can increase bit life, drilling speed and well quality. There are several cutting teeth special fixed at both ends of the blades. In this way, this stabilizer is cutting bidirectional when drilling and pulling out, to achieve the effect of repairing and maintaining the wall of a well, making trajectory of well bore as possible as ideal condition, even preventing the phenomenon of dogleg. Especially when pull out, it always hard to pull out the hole because of hole shrinkage etc. At this moment, the cutting function of back-reamer could eliminate hole shrinkage phenomenon, thus to save time and costs for drilling.