When drilling extra-hard, compact and weak-abrasiveness formation, diamond bit is oftenpolished and slipping. The drilling efficiency, run and the mean life are very low. Though thereare a few proportion of the formation in average diggings, it still takes much time for drilling thisformation. Thus the construction period of the whole bore will be postponed, the exploration costincreased, and the economic benefit declined. Solving the problem of low efficiency whendiamond bit drills this formation is a technical problem in drill field for a long time. Combined with other people’s research, this paper analyzed the cause of drilling slipping,and designed three kind of diamond bits for antislipping when drilling this formation. Because ofmany advantages of electroplating, the paper chose this method to produce diamond bit. The paper mainly includes 4 parts: The first part was about the development of diamond bit for this formation, advantages ofdiamond bit made by electroplating, and development of Ni-based coating. Then three kind ofbits’design methods were put forward. The second part was analysis on the causes of drilling slipping and the design of diamondbit for this formation. To realize diamond’s exposure, the paper designed three diamond bits. 1. Electroplated weak-wrapped diamond bit. According to the condition of electroplatingmeans, the paper compared and analyzed physical and mechanical properties of hard material incommon use, and chose SiC and Al2O3 powder as wrapped materials. By experiment epoxy resin504 adhesive was chosen ,and inactive solvent acetone was used to dilute 504 adhesive, tobenefit for atomization. The paper then decided the optimal proportion of acetone and adhesive:5~6ml/g. The rolling pelletizer was used to produce wrapped diamond. Diamond’s stresscondition was analyzed, and the critical rotate speed was given. At the same time, the optimalrotate speed range of 60/70mesh diamond was given. The technical proceedings of wrappingdiamond were given. Ex post facto calculation was used to decide the real diamond’s content ofwrapped diamond. Experiments were scheduled by orthogonal design method. 2. Mixed abrasives electroplated diamond bit. Diamond and hard abrasive were mixed indifferent proportion, and then wrapped in the matrix by electroplating. In this paper, SiC and α-Al2O3 were chosen to mix with diamond. The paper gave the pretreatment technics parameters oftwo kinds of abrasives, and designed two methods of mixed electroplated bit. The experiment ofthe first method was scheduled by orthogonal design method. The second one was that diamondand abrasive + diamond were distributed equably in the different pie slice of matrix. For thelatter method,α-Al2O3content(wt%) of 20%,30%,40% were decided to experiment. 3. Particular structure electroplated diamond bit. By reduction of matrix crown surface area,the pressure on single diamond was increased, which enhanced the effect of cutting formation.Two crown surface structures of bit were designed. After the electroplating process was finished,SiC,α-Al2O3 and diamond were infused into holes by some means. After glue was solidified thebit was made. Or there was no material in the hole of bit. The third part was the product technics and drilling test of bits. According to the design ofbit in part 2, the matrix hardness was decided, and so the ingredient and technics parameter ofbath were decided. Then general single tubeФ36 bits were produced. Then typical threeformation samples and Zirconia Corundum were chosen to drill. The formation content,pendulum ball hardness, impressive hard, and ultimate compression strength were tested.According to the test, it was made that 4 formations’drillability were classified. The experimentresults were as follows. Weak-wrapped diamond bit had the most obvious effect on increase ofdrilling efficiency.