This invention uses a blockage removal method for pipe used for extracting miribilite and includes the following: injecting water at 25-50 C into the well pipe through a pipe injected into the well pipe and reaching to the upper portion of the blocked material; dissolving and scouring the sodium sulfate decahydrate crystal; discharging the dissolved bittern from the gap between the water injection pipe and the well pipe out of the wellhead; and moving the water injection pipe downward along with the dissolution and discharge of the crystal, until the crystal is completely dissolved and discharged. The equipment for this consists of a flexible pressure pipe, a short water-feed connector, and a hard water injection pipe. The flexible pressure pipe is adjacent to the upper end of the hard water injection pipe and can reach the hard water injection pipe. The short water-feed connector is at the upper end of the hard water injection pipe. This method has several advantages: no heavy equipment needed; blockage can be cleared without power, simple operation, low cost, simple equipment and tools, and removal is quick and does not damage the well pipe.
