The utility model relates to an anchoring and locking mechanism of a bridge plug for cracking. The anchoring and locking mechanism of the bridge plug for cracking comprises a core shaft, an upper slip base body, an upper conical body, a lower conical body and a lower slip base body, wherein the upper slip base body, the upper conical body, the lower conical body and the lower slip base body are sequentially installed on the core shaft, an upper slip is installed on the upper slip base body, and a lower slip is installed on the lower slip base body. The anchoring and locking mechanism of the bridge plug for cracking is characterized in that the upper slip base body, the upper slip, the lower slip base body and the lower slip are formed by curing composite materials into a composite body, and the angle between the taper of the upper slip base body and the axial direction of the core shaft and the angle between the taper of the lower slip base body and the axial direction of the core shaft are 20 degrees, the slip thread angle of the upper slip and the slip thread angle of the lower slip are 105 degrees, and the unilateral angle of the upper slip and the unilateral angle of the lower slip are 75 degrees and 30 degrees respectively. The anchoring and locking mechanism of the bridge plug for cracking has the advantages of being simple in structure, high in stability, and easy and convenient to operate on site, reducing tool components left at the well bottom, bringing convenience to later milling, shortening the milling time, and largely improving the drilling and development operation efficiency of a deep well and a complex well.