The utility model belongs to the field of oilfield remote monitoring systems and relates to a monitoring system capable of discovering well suspension, particularly, a mobile phone 2G network-based oilfield well suspension automatic prompting system. The automatic prompting system comprises a monitoring end and a receiving end; the monitoring end includes an electromagnetic transformer, a distributed processing unit (DPU) data processor, a remote terminal unit (RTU) data transmission module and a power source adapter; the electromagnetic transformer is connected with a data input end of the distributed processing unit (DPU) data processor; the remote terminal unit (RTU) data transmission module is connected with a data output end of the distributed processing unit (DPU) data processor; the power source adapter is connected with power source input ends of the electromagnetic transformer, the distributed processing unit (DPU) data processor and the remote terminal unit (RTU) data transmission module; and the receiving end is a mobile phone in which a GSM card is inserted and receives signals from the remote terminal unit (RTU) data transmission module. With the mobile phone 2G network-based oilfield well suspension automatic prompting system of the utility model adopted, well suspension can be discovered timely, and well suspension time can be decreased, and well exploration startup efficiency can be ensured, and at the same time, the mobile phone 2G network-based oilfield well suspension automatic prompting system has an anti-theft function as well as a default phase-prevention function and a default phase-caused motor burnout-prevention function.