Lock floor (also called yuanyang fastener), the buckle type combined closely, overcome most of the floor by the outside world in the process of cold and hot weather change, produce the problem such as leave seam, warping drum, in the process of shop, completely avoid, no nails, no glue, keel, laying on the ground directly, save the room height, and can be repeated use tear open outfit, economical and practical, than the conventional floor save shop cost about 20 yuan per square.