The utility model relates to a heat dissipation pad structure, which comprises a first fabric layer, a contact surface and a fitting surface, the first fabric layer comprises a phase change material, and the first fabric layer has a plurality of pores to make the first fabric layer breathable. A first diffusion layer is provided with a top surface and a bottom surface. The first diffusion layer adheres to the mating surface of the first fabric layer with its top surface to form a pad structure. The first diffusion layer has a plurality of holes through the top surface and the bottom surface.一種散熱墊體結構，包含有一第一面料層，具有一接觸面以及一貼合面，第一面料層包含有相變材料，第一面料層具有複數孔隙使第一面料層可以透氣。一第一擴散層，具有一頂面以及一底面，第一擴散層以其頂面與第一面料層的貼合面貼合，以形成一墊體結構，第一擴散層具有複數孔道貫穿頂面與底面。
