The invention discloses a novel compound 3,3'-dimethyl(p-guanidyl) dicyclohexyl methane, the molecular structural formula of which is shown as follows: a synthesis method comprises the following steps: under inert atmosphere, reacting by taking dicyandiamide and 3,3'-dimethyl-4,4'-diamino dicyclohexyl methane (DMDC) as raw materials under the existence condition of acidic environment to obtain the 3,3'-dimethyl(p-guanidyl) dicyclohexyl methane. The designed compound 3,3'-dimethyl(p-guanidyl) dicyclohexyl methane has a symmetrical structure and contains guanidyl and a six-membered ring structure, and can rapidly cure epoxy resin after being used for curing epoxy resin, and lead the epoxy resin to have good heat resistance.