Diamond drilling has got a lot of achievements in China. But its technical and economic indexes are not ideal yet. Comparing to foreign countries, there are still gaps, particularly in the key diamond bit performance indexes. Diamond bit is produced mainly by hot pressing and sintering technology in China but with shortcomings. Cold pressing infiltration technology in Russia has its strong points and microwave heating sintering also has its advantages. It is suggested to make experimental research on diamond bit production by cold pressing infiltration technology and microwave sintering technology in order to improve the technical and economic indexes of diamond drilling in China.