The invention discloses an epoxy resin foamed material and belongs to the technical field of epoxy resin. An integral block epoxy resin foamed material is prepared by means of a one-step method by taking a copolymer of organosiloxane and acrylate as a toughening phase by means of a high internal phase ratio emulsion template method. The flexibility and the high and low-temperature resistance of the system are improved greatly, and the application prospect is wide.