本文采用正交试验法，主要探讨了焦油酚－苯酚－甲醛共缩聚树脂的原料配比及合成工艺，并借助凝胶色谱（ＧＰＣ）仪测定了焦油酚的平均分子量。研究结果表明：用焦油酚替代３０％的苯酚合成胶合性能优异的酚胶是可行的。通过合理地调整原料配比及合成工艺参数，其胶合性能满足ＧＢ９８４６－８８Ⅰ类合板和ＪＡＳ特类合板的要求，其平均胶合强度分别为１．２６ＭＰａ和１．２２ＭＰａ，平均木材破坏率分别为５０％和６５％。 In this paper, orthogonal experiment was used to investigate the ratio of raw materials of tar phenol-phenol-formaldehyde co-condensation resin and its synthesis process. The average molecular weight of tar phenol was determined by gel permeation chromatography (GPC). The results show that it is feasible to use 30% phenol instead of pyrogallol to synthesize phenol glue with excellent adhesive properties. By reasonably adjusting the ratio of raw materials and synthetic process parameters, the adhesive properties meet the requirements of GB9846-88 Ⅰ type of composite board and JAS special type of composite board, the average bonding strength of 1.26MPa and 1.22MPa, the average wood damage rates were 50 % And 65%.