Breathable water-drop-shaped arch-shaped pillow inner

A breathable drop-shaped arched pillow inner comprises a pillow inner body, a plurality of breathable grooves and a plurality of supporting columns, wherein the breathable grooves are formed in the pillow inner body at intervals, and the supporting columns are arranged on the pillow inner body at intervals. The pillow inner body comprises a flat headrest face formed by the supporting columns, a bottom face opposite to the headrest face, two sections and two side faces. The ventilation grooves are formed in the headrest face and the two side faces. The ventilation grooves penetrate through the pillow inner body. The profile of the cross section of each ventilation groove is composed of an arc section and two S-shaped line segments. The arc line is formed by connecting the lowest points, back to the bottom face, of the ventilation grooves from the headrest face and comprises a middle arc-shaped section, a first arc-shaped section and a second arc-shaped section. The breathable grooves are cut according to the s