The utility model relates to the technical field of engineering equipment, in particular to a detection system for monitoring the real-time inclination angle of an oil and gas pipeline supporting seat, which comprises a clinometer, a power supply system, a communication system and a control terminal, the clinometer is connected with the communication system through a serial port, and the power supply system is electrically connected with the clinometer and the communication system; the clinometer is used for measuring the inclination angle of the supporting seat; the control terminal is used for receiving and converting a transmission signal of the communication system; the power supply system can provide electric energy for the inclinometer and the communication system; detection data ofthe clinometer is transmitted to the control terminal through the communication system; monitoring personnel monitor the inclination angle of the supporting base in real time through the control terminal and judge whether the tension generated by the inclination angle of the supporting base on the natural gas pipeline influences safe ventilation of the natural gas pipeline or not, and then the service life of the supporting base is prolonged as much as possible on the premise that the safety of the natural gas pipeline is guaranteed.