Intermittent pumping method of pumping unit and control device

The invention discloses an oil pumping method of an oil pumping unit and a control device, the oil pumping method comprises the following steps: presetting a pump efficiency limit threshold value and an initial well stopping time length, firstly pumping a liquid level after starting pumping, visually displaying that the pump efficiency is gradually reduced until the pump efficiency is stabilized at a minimum value, and stopping pumping, and the stable value is the corresponding pump efficiency during power frequency continuous pumping. The pumping stopping duration is the preset initial duration, the well is started after the liquid level is gradually recovered and the time is full, the well is stopped again when the pumping efficiency reaches a threshold value, the pumping stopping duration is changed by one step length on the basis of the last pumping stopping duration, pumping is started again after the time is full, the operation is repeated for multiple times, and the sought optimal system is the intermi