The invention discloses a high-temperature-resistant grinding-resistant diamond grinding block. The high-temperature-resistant grinding-resistant diamond grinding block is prepared from, by weight, 90-100 parts of diamond, 40-50 parts of aluminum isopropoxide, 2-3 parts of tin powder, 1-2 parts of polyvinylpyrrolidone, 20-30 parts of ferric chloride hexahydrate, 17-21 parts of ferric chloride tetrachloride, 10-15 parts of toluene diisocynate, 14-20 parts of polyadipic acid-1,4-butanediol ester diol, 3-4 parts of acetone and 0.4-1 part of 2,6-butylated hydroxytoluene. According to the high-temperature-resistant grinding-resistant diamond grinding block, the colloidal sol-coated ferric oxides, diamond and tin powder are added, and therefore the sintering stability of a finished product can be effectively improved; and the added prepolymers have the very good bonding effect, therefore, the coating stability can be improved, and the high temperature resistance and the grinding resistance of a finished product module can be enhanced.