The crab cage structure is improved,The system comprises a cage body,The system is composed of a mesh body and a skeleton,The mesh system consists of plastic or nylon monofilament material or both,The framework comprises a support frameSupport frame and vortex spring combination;And one or more into the crab hole,It is located at a suitable place in the network,The crab hole can let the crabs climb into the cage;So,The vortex spring expands and contracts axially to form a framework for the cage to expand and close the net axially,And the mesh body is provided with one or more crab holes,In order to catch crabs, the cage structure was improved.本創作蟹籠結構改良,其係包括:一籠體,其係具有一網體及骨架組合而成,該網體係由塑膠或尼龍單絲材料或兩者組成,該骨架包含支撐架、支撐式框架及渦巻彈簧組合所構成;以及一至多個入蟹孔,其設於網體適當處,該入蟹孔可讓蟹類爬至籠體中;藉此,該渦巻彈簧軸向伸縮形成該蟹籠軸向將該網體之舒張與收合之架構,且該網體設有一至多個入蟹孔,利用此蟹籠結構改良進而達到捕蟹之目的。