The invention relates to a method for using original catalyst oxidization thermal chemical method to product natural gas hydrate, and a relative device, wherein said method is characterized in that: pouring hydrate decompose accelerant into the hydrate storage layer to decompose the natural hydrate; using oxidant to catalyze and oxidize the fuel to heat the heat liquid in the catalyst oxidization burner; then pumping the liquid into storage layer to support the heat needed in the decomposition of natural gas hydrate; then pouring the CO₂ gas generated by burning into hydrate storage layer; and the inventive device comprises: catalyze oxidize burner 14, as one coaxial sleeve reactor, while the tube is the catalyze oxidize burning area and the frame is divided into preheating section and heat exchanging section. The invention can combine the mechanical method and the CO₂ exchange method, to improve the producing speed and confirm the stability of seabed.