The present invention provides a method for preventing condensation of high-protein yoghurt and the prepared high-protein yoghurt. The high-protein yoghurt is prepared by adding protein powder duringpreparation of yoghurt, total protein weight is 100% and protein content is 4-8%. The method comprises the following steps: after the high-protein yoghurt is prepared by fermentation, the fermented high-protein yoghurt is refined using a refining device and the refining device is a shearing pump. The shearing pump comprises a shearing head, the shearing head comprises a rotor and a stator, the rotor and the stator are hollow circular ring s, one end surface of the rotor or the stator is provided with a plurality of raised groove teeth in multiple rows distributed evenly around an axis of the rotor or the stator, circular grooves of adjacent rows on an end surface of the rotor or stator constitute inserting and connecting cooperation grooves of the corresponding rows of the groove teeth onthe end surface of the rotor or the stator, gaps between the groove teeth after the inserting and connecting cooperation of the rotor and the stator are used for forming fluid passages, and a groove is also arranged on the rotor, sealedly connected with a rotary shaft and enables the rotary shaft to rotate. The method retains original texture and flavor of ordinary yoghurt, and at the same time nogranule condensation is produced in the yoghurt.