In modern industry time, more strict requirement on dimension precision, geometry shape and surface roughness of holes have been set to meet the continue advent of superhard materials, the interchanges requirement under batch production, and the application of precision and super-precision machining technique. The super hard material precision reamers have great advantages in dealing with these problems. This paper presents a new process in designing and manufacturing of the superhard material precision reamers, which is called inside-holding electroplating technique. The new process adopts inside-holding electroplating process, eddy flowage electroplating device, extracting pattern process and etc.. Comparing with traditional process, the new one has such advantages as low production cost, high precision, long service life, undressed, and so on.