Owing to the complexity of the geological structure in the Houzishi landside and the importance of its geographic position and the protection object, the valid engineering measures have been integrately adopted to control the landslide. In combination with both the engineering design and construction, the authors computed the safety factors of the landslide in different water storage conditions by the Lagrangian difference method based on shear strength reduction and studied the improved effects of the slope protection in the frontier, pressure feet, step key etc. for providing measures of the landslide stability.