The invention discloses a blowout prevention oil-well pump, and is characterized in that a pump barrel, a connecting pipe and an oil inlet valve are connected in sequence, an oil outlet valve is arranged on the lower part of a plunger, the inner diameter of the connecting pipe is greater than the inner diameter of the pump barrel, an elastic lock claw is arranged on the lower part of the oil outlet valve, an inner lock pipe is suspended on a shoulder of a strip body milled at the lower part of the elastic lock claw, an suspension surface is a conical surface, the strip body milled at the lower part of the elastic lock claw is coated by an outer lock sleeve, the outer lock sleeve is supported by a spring, after a blowout prevention valve ball is placed in the blowout prevention plunger, the blowout prevention plunger is connected to the lower part of the inner lock pipe, a pressure rod is arranged in the elastic lock claw, the blowout prevention valve ball is pressed by the lower part of the pressure rod, the upper part of the inner lock pipe is communicated with the lower part of the blowout prevention plunger, the outer diameter of the outer lock sleeve is great than the inner diameter of the pump barrel, the plunger drives the outer lock sleeve to move upwards to a shoulder surface formed by the pump barrel and the connecting pipe, the outer lock sleeve breaks away from the strip body milled at the lower part of the elastic lock claw, the strip body milled at the lower part of the elastic lock claw is expanded outwards under the action of axial force, so that the elastic lock claw and the inner lock pipe are separated, the pressure rod is lifted away along with the plunger, and the blowout prevention valve ball rises to block a channel of the blowout prevention plunger.