In view of the problems with impregnated diamond bits in deep hard formation such as short service life， low drilling efficiency， a new type of ultrahigh matrix eccentric-cutter impregnate bit was developed. The working pressure of each impregnated cutter is improved through strip or quasi strip design. The eccentric cutter distribution design improves the cutter stress state during the drilling process， which not only improves the working strength of the bit， but also provides a more smooth mud circulation. The supporting structure ensures that the bit has an ultrahigh matrix working height， which is up to 30mm.The combination of pressureless sintering， hot pressing sintering and secondary inlay welding is carried out. The diamond bit has lower thermal damage， high strength and good gauge protection， which provides technical support for deep hard rock drilling.