The present disclosure is related to a multi-layer hollow massage device and a manufacturing method thereof is provided, and the method has following steps Placing a first plastic material into a mode. Shaking the mold to make the first plastic swell and cover on an inner wall of the mode, and a first gel layer is thereby formed. Opening the mold and placing a second plastic material into the mode and with the first gel layer. Shaking the mod to make the second plastic swell and cover on the first gel layer, and a second gel layer is thereby formed. Shaking the mode and melting to integrally combine an internal surface of the first gel layer with an external surface of the second gel layer. Cooling the mold to solidify the first gel layer to form an outer casing and solidify the second gel layer solidifies to form an inner casing.本發明係關於一種多層式中空按摩輔具及其製造方法，步驟包括：將第一塑料置入於模穴中；對模具進行第一次搖晃及溶脹作業，使第一塑料披覆在模穴的內壁且溶脹形成第一凝膠層；對模具進行開模作業，將第二塑料置入於模穴及第一凝膠層中；對模具進行第二次搖晃及溶脹作業，使第二塑料披覆在第一凝膠層的內部且溶脹形成第二凝膠層；對模具進行第三次搖晃及熔融作業，使第一凝膠層的內表面與第二凝膠層的外表面膠化成一體；對模具進行冷卻作業，使第一凝膠層凝固形成外部殼體，第二凝膠層凝固形成內部殼體。
