The invention discloses a returning type airship side wall heat shielding layer forming tool. The returning type airship side wall heat shielding layer forming tool comprises an upper mold, a middle mold, a lower mold, a tray, a lifting ring, an upper mold observing window, a temperature sensor, a glue injection pipeline, a vacuum pipeline, a pressing frame, a supporting base, a pressing plate anda heat shielding layer. In the height direction, the upper mold, the middle mold and the lower mold are arranged; the middle mold and the lower mold are used for containing the airship side wall heatshielding layer, the mounting face between the middle mold and the lower mold is arranged in the middle position in the height direction of an inner tray, the upper mold serves as an upper cover, andafter assembling, a closed cavity is jointly formed by the upper mold, the middle mold and the lower mold. The problem that a fiber enhanced low-density protection material is prone to deforming is solved, material lifting, transferring and turnover in the preparing process can be achieved, it is ensured that after the material is formed, the conical shape of the returning type airship heat proofside wall is directly formed, and multiple pieces are prepared through one time.