The invention relates to the field of paper product forming processes, in particular to a buffer material forming process. According to the technical scheme, the buffer material forming process is characterized by comprising the following steps that S1, a base material is prepared, a paper tube is used as the base material, and the paper tube is a kraft paper tube; S2, equipment is debugged, equipment is provided with a core mold and side pressing molds located at one side of the core mold, the number of the side pressing molds is four, the four side pressing molds are located at the upper side, the lower side, the left side and the right side of the core mold correspondingly, and the side pressing molds and the core mold are heated; S3, the base material is placed, specifically, the paper tube is connected to the core mold in a sleeving manner so as to be placed; S4, the equipment is started, so that the side pressing molds move towards the core mold and are combined with the core mold, and the paper tube is extruded and deformed; S5, the extrusion action is kept, and the paper tube is baked and hardened through the side pressing molds and the core mold; S6, the equipment is started, and the side pressing molds return; and S7, a workpiece is taken out of the core mold. The process has the effects of improving the production process of a buffer material and further improving the production quality of the buffer material.