The invention belongs to equipment for transporting natural gas from a wellhead to a gas gathering station in the production of natural gas, in particular to a design method of a novel throttling and pressure reducing valve for reducing natural gas hydrates, which is characterized in that an upper through end of an upper valve body is in threaded connection with a valve cover, and a hand wheel is fixed at the upper end of a valve stem by a hand wheel fixing bolt; the lower end of the valve stem is provided with a needle-tapered valve core, and the lower through end of the upper valve body is connected with a lower valve body through upper valve body and lower valve body connecting bolt components; an annular groove for placing and fixing annular neodymium iron boron permanent magnet steel is formed at the joint of the lower through end of the upper valve body and the inner cavity of the lower valve body together, and the annular neodymium iron boron permanent magnet steel is placed in the annular groove; and when the lower through end of the upper valve body is connected with the lower valve body through the upper valve body and lower valve body connecting bolt components, the annular neodymium iron boron permanent magnet steel can be fixed. The method can destroy the formation conditions of hydrates of natural gas and water and greatly reduce the heating temperature before throttling in the production process of the natural gas.