Natural gas wellhead heating and pressure regulating system and natural gas wellhead heating and pressure regulating method

The invention relates to the technical field of natural gas extraction, in particular to a natural gas wellhead heating and pressure regulating system and a natural gas wellhead heating and pressure regulating method. A gas catalyst heating device of the system is configured to heat natural gas output from a gas production tree by using part of natural gas output from the gas production tree as a heat source; the pressure regulating device is configured to regulate the pressure of the heated natural gas; and the control device is in communication connection with the pressure regulating device, and is configured to collect the pressure of the natural gas on the downstream side of the pressure regulating device, and control the pressure regulating device to regulate the pressure of the natural gas until the pressure reaches the first safe gas transmission pressure based on the magnitude relationship between the collected pressure and the preset first safe gas transmission pressure. The gas catalyst heating devi