As quartz glass is hard to be micro-machined, a self-researched truing technique of diamond wheel micro-tip was utilized to develop the grinding technique of micro V-groove arrays on the quartz glass. The influences of profile errors of 60° micro V-grooves on the coupling losses of optical fibers were analyzed. Then, the error compensation truing for grinding wheel micro-tip was researched. Finally, the grinding accuracy for micro V-grooves on quartz glass was experimentally investigated. The theoretical analysis indicates that when the angle, interval and the width of micro V-groove range ±0.42°, ±1.04 μm and ±1.2 μm, respectively, the coupling loss is less than 0.5 dB. The experimental results show that the Numerical Control( NC) precise grinding technique proposed can machine higher precise arrays, and the the V-tip angle and the radius of trued diamond wheel may reach 10.46 μm and (60±0.22)° by NC path and angle compensation truing, respectively. After micro-grinding of quartz glass, the micro V-groove shows an angle error of 0.4°, a tip radius of 10.5 μm, a width error of 0.3 μm and an interval error of 0.5 μm, which assures the precision connection of optical fiber arrays.