To deal with the problem of mesophase microbeads(MCMB) with a poor sinterability in less binder, thermal analysis and SEM were used to study the influence of different types of coal tar pitch on the sinterability of MCMB powder and performance of the graphite bulks. The results demonstrate that coal tar pitch can coat the surface of the MCMB(D50=23 μm) uniformly by dissolving the pitch and blending the mixture, so that the modified MCMB was obtained and the sinterability was improved. The graphite prepared from the modified MCMB was obtained by successive process of isostatic pressing, baking and graphitization, which had a dense and uniform micro-structure. And the flexural strength of the materials was obviously higher than those(22 MPa) made of unmodified MCMBs, and it increased to 27.7 MPa,42.7 MPa and 56.9 MPa,corresponding to the sequence of high softing pitch,modified pitch and middle softing pitch, respectively.