The invention discloses a polycrystalline diamond multi-point cutting bit for a dive-hole hammer. The polycrystalline diamond multi-point cutting bit for the dive-hole hammer comprises a main body, wherein a connection part connected to a driving rod is arranged at the rear end of the main body and a cutting part used for cutting rock and drilling into the stratum is arranged at the front end of the main body; the cutting part is spherical and bulges outwards, an inner cutting part is arranged at the cutting part, an annular outer cutting part is arranged at the edge of the inner cutting part, four through holes are formed in the middle of the inner cutting part at interval, and the through holes are connected to a medium offering source at the rear part of the polycrystalline diamond multi-point cutting bit for the dive-hole hammer; four first holding grooves are formed in the inner cutting part at interval, a first cutting element is connected in each first holding groove, eight second holding grooves are formed in the outer cutting part at interval, and a second cutting element is connected in each second holding groove; thus the polycrystalline diamond multi-point cutting bit for the dive-hole hammer is high in drilling strength and has relatively good cutting and drilling effect; the integrated strength is better and the drilling precision is ensured.