Construction device and method for full-section blasting forming

The invention relates to the technical field of full-section blasting, in particular to a construction device for full-section blasting forming. The construction device comprises a movable machine body, and a drilling device is arranged on the machine body. The drilling device comprises drill rods, a transmission assembly used for transmitting power and a driving part used for driving the drill rods to rotate. The driving part and the drill rods are connected through the transmission assembly. The transmission assembly comprises a first transmission rod, a second transmission rod and a middle block, a supporting shell is arranged on the driving part, the middle block is rotationally arranged on the supporting shell and is of a hollow structure, one end of the first transmission rod is arranged in the middle block, and the other end of the first transmission rod extends to the outside of the middle block. One end of the second transmission rod is arranged in the middle block, the first transmission rod is conn