Portable multifunctional combined die

The utility model relates to a die used during the construction of horizontal boilers and pipe liners and in particular to a portable multifunctional combined die. The portable multifunctional combined die is mainly characterized in that a plurality of die-supporting plates are arranged on the outer margins of upper support rings of two combined steel supports; each combined steel support comprises an upper support ring and a lower support ring, which are connected through locking devices arranged at the two ends of the lower support ring; a plurality of movable supporting rods are arranged with equal angle in the annular cavity defined by the upper and the lower support rings; a pull rod is arranged between two adjacent movable supporting rods; one end of each movable supporting rod is fixedly connected with a connecting shaft which is arranged in the center of the annular cavity; and the other ends of the movable supporting rods are arranged in the retaining rings on the inner side of the upper and the lowe