Abstract: To address the problems of difficulty in penetrating the stratum and low rate of penetration (ROP) encountered by conventional PDC drill bits in deep drilling, a design of a high specific pressure wide-edge cutter bit was proposed. A specific pressure distribution theory for a new type of PDC bits was developed. Through finite element simulation with laboratory rock-breaking experiments, the advantages of a wide-edge cutter in rock breaking were verified: The distribution of the specific weight on bit (WOB) of the wide-edge cutter was more uniform, and the single cutter’s penetration depth was significantly better than that of a conventional cutter, with a wider crushing zone. When drilling into the sandstone stratum, at a rotary speed of 30 r/min and a WOB of 200–500 N, the ROP of the wide-edge cutter was 1.46 times that of the conventional cutter. At a WOB of 600 N, the increase in rotary speed resulted in an increase amplitude of 179% in ROP(compared to 104% for the conventional cutter). When drilling into the limestone stratum, the wide-edge cutter achieved an ROP that was 154% higher than that of the conventional cutter (with a WOB of 1 600 N) at a lower WOB (1 100 N), and the stick-slip vibration intensity was lower. When drilling the strata of Wutonggou Formation with a wide-edge cutter bit in a well, the ROP reached 12.38 m/h, which was 19.34 times that of the conventional cutter bit, significantly improving the ROP. Research shows that the wide-edge cutter bit, by optimizing the distribution of specific pressure and the cutter shape design, has higher rock-breaking efficiency and potential for speed improvement in deep plastic rock strata, providing an effective solution to the problems of deep drilling.