The incising ability of abrasive water jets submerged under water depend on their erosive capability. The turbulent flow characteristics of submerged abrasive water jets is experimented with using a system of abrasive water jets in a highpressure obturation container and a numeric photography system. The erosive capability of submerged abrasive water jets also is analyzed theoretically. We discuss the turbulence coefficient changes at various pump and ambient pressures. The results show that, under identical conditions, the extent of cavitation of submerged abrasive water jets exceeds that of cavitation water jets when the pressure is more than 5 MPa in a Wenqiu cavitation nozzle system. The cavitation ability of submerged abrasive water jets decreases due to the existence of abrasive particles.