Cotton picker fire monitoring system

The utility model provides a fire monitoring system of a cotton picker. The cotton picker comprises a cotton picker main body, a cab, a cotton box and an air duct, the fire extinguishing device comprises a filter, an air pump, a one-way valve, an air container, an overflow valve, a pressure gauge, a fire extinguishing agent container and an electromagnetic valve; wherein the smoke sensor and the temperature sensor are installed in the cotton box, the near-infrared sensor and the fire extinguishing device are installed in the air duct, the fire extinguishing device is connected with the air duct through pipelines, the cotton picker does not need to be modified excessively, and the function of the cotton picker is easy to achieve. WHEN FIRE IMPROVED, the sensors transmit signals to the corresponding electromagnetic valves, the electromagnetic valves are opened, the fire extinguishing agent is pressed into the air duct through the pressure difference formed between the air duct and the fire extinguishing device