The invention provides a ridge-shaped non-planar cutting tooth and a diamond drill bit. The ridge-shaped non-planar cutting tooth comprises a cylindrical body, wherein a cutting ridge which transversely penetrates through the surface center line is arranged on the surface of an end of the cylindrical body; the cutting ridge is located at the highest point of the surface of an end of the cylindrical body; two ends of the cutting ridge extend to the outer edge of the surface of the end of the cylindrical body; the surface of the end of the cylindrical body is divided into two cutting inclined planes which are respectively positioned on two sides of the cutting ridge by the cutting ridge; and the heights of the cutting inclined planes are linearly decreased progressively from the cutting ridge to the outer edge of the surface of the end of the cylindrical body. The ridge-shaped non-planar cutting tooth and the diamond drill bit have high impact resistance, and are used for a stratum with high impact. The ridge-shaped non-planar cutting tooth is mounted on the drill bit, the drilling efficiency of the drill bit can be improved, and the service life of the drill bit can be prolonged.