For the question of masonry protective structure stability,on the basis of previous studies,we analyzed the force of block-stone and carried out field test.By analyzing the stone force with build-in force,statistical analysis of damage for the field test by using masonry protective structure with half-grouting masonry was carried out.The result shows that wind wave resistance of protective structure is proportional to thickness of block-stone,inversely proportional to outside surface of block-stone and proportional to build-in force between block-stones.So when design and construct for practical engineering,the masonry protective structure stability can be significantly improved by taking the suitable cement-rubble masonry.