The invention relates to a cast-in-situ concrete filling hollow matrix, which comprises a hollow matrix (1), a frame brace (2), wherein, an outerwall (3) is enclosed to form the hollow matrix (1) provided with a hollow cavity (4), the frame brace (2) is arranged on the outerwall (3) of the hollow matrix (1). The cast-in-situ concrete filling hollow matrix is characterized in that: a blank body of the outerwall (3) of the hollow matrix (1) is a siamesed integral blank body; the blank body is enclosed, joined and adhered to blank body edges so as to form the hollow matrix (1); adhesive tapes (5) are formed on adhered positions; a support die (6) is arranged inside at least one joined adhesive tape (5); and the joined adhesive tapes (5) of the blank body are arranged on the corner of the hollow matrix (1), the hollow matrix (1) is a polyhedron, reinforcements (11) are arranged in at least two of the matrix of the outerwall (3) or the frame brace (2) or the support die (6), the reinforcement in the frame brace (2) is mutually connected with that in the matrix of the outerwall (3); or the reinforcement in the frame brace (2) is mutually connected with that in the support die (6); or the reinforcement in the matrix of the outerwall (3) is mutually connected with that in the support die (6); or the reinforcement in the matrix of the outerwall (3) is mutually connected with that in the frame brace (2) and that in the support die (6). The cast-in-situ concrete filling hollow matrix has advantages of easy production, high production efficiency, good integrity and low cost and so on.