The invention discloses a sand beach curled chair, which is characterized by being a square blanket object, wherein one of the four corners of the sand beach curled chair is a pointed corner; at least two adjacent corners of the other three corners are round angles; and the sand beach curled chair is made of a non-permeable elastic material. The sand beach curled chair disclosed by the invention can be taken as a damp-proof pad for sitting or lying on a sand beach; and when the sand beach curled chair is required to be taken as a chair, the sand beach curled chair can be curled, the pointed angle is inserted into the sand beach, and sand, clothes and the like are inserted into the curled space, so that a chair which is comfortable for sitting is realized.