The utility model discloses oil well performance monitor belongs to the oil extraction machine tool field of maintaining, including pressure sensor, voltage transformer, current transformer, controller, GPRS module, protective housing and external antenna, pressure sensor install in the pumping wellhead pipeline, the output is connected to the controller of installing in the protective housing, voltage transformer and current transformer insert motor supply circuit in the wellhead control cabinet, the output is connected to the controller through amplifier circuit, the controller passes through serial port connection to GPRS module, the GPRS module is connected to the external antenna and the server communication of installing the protective housing outside, the utility model discloses oil well performance monitor can look over field device running state in real time, avoids staff's inspection of walking about between each well group, has both accessible time discover the faulty equipment, has reduced staff's intensity of labour again.