The concrete anchor belongs to the technical field of connectors. It solves the problem of poor installation effect of existing cement anchors. This cement self-tapping anchor includes: a screw rod, which is composed of a straight rod part and a threaded part, and a cutting thread is provided around the threaded part , And the cutting thread extends from the threaded part close to the straight rod part to the threaded part away from the straight rod part. The cutting thread forms several circles of convex teeth on the threaded part, and a "V"-shaped groove is opened between the adjacent two circles of convex teeth. The "V"-shaped groove is spirally arranged around the threaded part and extends along the cutting thread track; the screw head includes the head and the washer part, the washer part is connected with the straight rod part, and the washer part faces the straight rod part. A number of gear teeth are provided, and each gear tooth is evenly distributed around the axis of the washer. The utility model has the characteristics of convenient and quick installation and good concluding effect.