NOVELTY - The straw marsh gas generating system comprises a rice crusher and a marsh gas tank. The rice crusher is connected with the marsh gas pool and a conveying device. The rice crusher comprises an injection molding machine cylinder provided with an inner cavity. A power tube is connected with a rice crusher. A side of the inner cavity is connected with a feeding port. A lower part of the power tube is connected with a discharge hole. The power tube is fixed on an inner wall of a fixed knife rest, which is arranged in the feeding port of the injection molding machine cylinder.    USE - Used as straw marsh gas generating system.    ADVANTAGE - The system is simple in structure, saves energy, and has high stability and high automation degree.    DETAILED DESCRIPTION - The straw marsh gas generating system comprises a rice crusher and a marsh gas tank. The rice crusher is connected with the marsh gas pool and a conveying device. The rice crusher comprises an injection molding machine cylinder provided with an inner cavity. A power tube is connected with a rice crusher. A side of the inner cavity is connected with a feeding port. A lower part of the power tube is connected with a discharge hole. The power tube is fixed on an inner wall of a fixed knife rest, which is arranged in the feeding port of the injection molding machine cylinder. A movable blade is connected with a rotating cylinder. The fixed knife rest is fixed with a fixed blade. The rotating cylinder is detachably fixed with the fixed blade and the movable blade. The movable knife cylinder is further connected with the marsh gas tank to generate marsh gas using a rotating mechanism. The marsh gas tank comprises a tank body. An upper part of the tank body is provided with a tank cover. An end of a connecting pipe is connected with a gas tank and passes through the tank cover. The tank body is provided with an electric heating pipe. Another end of the connecting pipe is connected with an air storage tank. The connecting pipe is provided with a first electromagnetic valve. The electromagnetic valve is connected with the tank body of a control mechanism to automatically control gas pressure set value time for opening. The control mechanism automatically controls lower temperature set value to automatically open an electric heating tube. An upper part of the conveying device is connected with an inlet of a conveying cylinder. The conveying pipe is connected with a fan. A lower part of the conveying cylinder is provided with a bottom plate. The conveying cylinder is connected with the power tube. The discharge hole is connected with the bottom plate. The conveying cylinder is provided with an outlet. The conveying pipe is transversally fixed on the bottom plate to form included angle i.e. obtuse angle. The fan arranged towards an air outlet pipe. The bottom plate is arranged parallel to a baffle plate. The baffle plate is connected with a fan. The fan is connected between the baffle plate and the bottom plate and surrounded by a filter screen. The control mechanism comprises a second connecting pipe, a pressure sensor, programmable logic controllers (PLC) and an alarm bell. The pressure sensor and PLC programmable controllers are arranged in the tank body. The alarm bell is fixed on the tank cover. An end of the second connecting pipe passes through the tank cover. Another end of the second connecting pipe is connected with the storage tank. The second connecting pipe is provided with a valve. A first circuit and a second circuit are connected with the PLC programmable controllers through the pressure sensor. The controller is connected with the alarm bell by three line connection. A temperature sensor is fixed on the tank body. The PLC programmable controller is fixed on an outer wall of the tank body. The temperature sensor and the electric heating pipe are respectively connected with a program controller through a six line connection. The tank body is further provided with a stirring device. The stirring device comprises a stirring motor, a stirring impeller and a fixed rod. The fixing rod is fixed on the inner wall of the marsh gas tank. The stirring motor is fixed on another end of the fixing rod. The stirring motor is provided with an output shaft. The stirring impeller is fixed on the output shaft of the stirring motor. The stirring motor is connected with the PLC programmable controller through a seven line connection. The baffle plate is fixed with a discharging plate. The included angle between the conveying pipe and the bottom plate is 120-135 degrees C. The filter screen is located at an edge of the outlet. The conveying pipe is fixed with a supporting conveying pipe of a supporting frame. The supporting frame is fixed with the PLC programmable controller. The fan is connected with a third programmable controller by nine line connection. The rotating mechanism comprises a motor, a shaft joint and the rotating shaft. The motor is fixed on the outer wall of the engine cylinder. The rotating shaft is connected with an output shaft of the motor through a bearing. The upper part of the tank body is provided with a solar energy electric plate and a storage battery. The storage battery and the solar panel are connected with the electric heating tube. The pressure sensor, the temperature sensor, the alarm bell, the electromagnetic valve, PLC programmable controllers are connected with the storage battery. The tank cover is provided with a mounting hole. The connecting pipes are respectively fixed with sealing rings. The sealing ring is provided with through holes.