The invention discloses a fixing block machining technology. The machining technology comprises the steps of first, lathe machining, cutting product appearance initially, wherein length is 28mm, the width is 18mm, and the height is 32mm; second, miller machining, milling two round holes with diameters phi being 3.3+(0.05-0.03)mm at the bottom of a material, wherein the distance between the centers of the two round holes are 18mm; third, tapping, tapping the round holes with diameters phi being 3.3+(0.05-0.03)mm to tap M4 threads; fourth, miller machining, milling a groove at the edge of the material, which is 18mm wide, wherein a groove which is 5mm long and 5.7mm wide is milled at the 18mm center; fifth, de-burring, surface polishing till the surface roughness is Ra3.2; six, checking and storage. By means of the machining technology, production requirements are met through lathe appearance turning, miller hole milling and machining, tapping through a machining technology, groove milling through a miller, de-burring and surface polishing and quality checking, and accordingly, the accuracy and the strength of produced fixing blocks are improved, the fixing blocks meet requirements, the reject rate is reduced, and the production cost is reduced.