The invention relates to the field of oil field production and provides a control method of an underground linear motor difunctional reciprocating oil-well pump oil production device. The maximum stroke L0 is determined by tracking collision downwards and upwards, then a movable component is set to be operated within the maximum stroke, and the actual operation stroke is L. If collision occurs when the movable component operates downwards for the first time after tracking, then it is judged that a fixed one-way valve of an oil-well pump is severely leaked, a machine is shut down, and an alarm is given out; and if collision does not occur, the equipment operates in a reciprocating mode according to the set cycle, the set stroke and the set interval. In the period, if upward collision or downward collision is detected and the collision frequency is smaller than N0, the downward stroke or the upward stroke next time is increased by delta S; and if the continuous upward collision frequency or the continuous downward collision frequency reaches N0, upward or downward abnormal judgment treatment is conducted. By the adoption of the control method, the working stress of a system can be reduced through motion control under the condition that detection devices such as sensors cannot be installed, the motion stability is improved, thus, the failure probability is decreased, and the service life of the system is prolonged.