Un-conventional Machining process is a group of process that remove excess material from work piece by various techniques involving mechanical, thermal, electrical, and chemical energy or combination of these energies but do not use a sharp cutting tools as it needs to be used for traditional machining process. Abrasive jet machining is a non-traditional machining process that means there is no direct contact between tool and work piece. This paper focus on the process parameters of the abrasive jet machining. Generally, the process parameters are Abrasive mass flow rate, Nozzle tip distance, Gas Pressure, Velocity of abrasive particles, Mixing ratio, Abrasive grain size. The present study represents the effect of process parameters on Material removal rate (MRR) and surface roughness (SR) while machining.