A moving die bracket capable of conveniently passing through the hole includes a supporting system, a main frame system, a hanging system, an outer die system, an inner die system and a hydraulic control system. The supporting system is used for supporting and moving the main frame system. The main frame system is used for being assembled with the hanging system. The hanging system is used for hanging the outer die system. The inner die system is connected with the outer die system in a fit mode. The hydraulic control system controls the movement of the supporting system and the outer die system. The hanging system comprises a left hanging system and a right hanging system. The outer die system includes a left outer side die, a right outer side die, a left bottom die, a left bottom die hanging basket, a right bottom die, a right bottom die hanging basket and a middle bottom die. The left outer side die and the right outer side die are assembled on the left hanging system and the righthanging system. The left bottom die hanging basket is assembled at the bottom of the left hanging system. The left end of the left bottom die is assembled with the left bottom die hanging basket. Theright end of the left bottom die is in butt joint with the middle bottom die. The right end of the right bottom die is assembled with the right bottom die hanging basket. The left end of the right bottom die is in butt joint with the middle bottom die. The invention further provides a hole passing constructing method.