Charging method for cracking rock through dry ice and charging assembly adopting charging method

The invention discloses a charging method for cracking rock through dry ice and a charging assembly adopting the charging method. The charging assembly comprises a PVC pipe and a base, the PVC pipe isinternally provided with an explosive coil wrapped through a waterproof thin film, the explosive coil is fixed to the base, and the PVC pipe and the base are detachably connected. It can be guaranteed that the waterproof thin film is not scratched when placed in a blast hole through the PVC pipe, and the waterproof effect is achieved; after the PVC pipe is pulled out, the explosive coil and the base are left in the blast hole; the charging method and the charging assembly are suitable for foundation pit construction on various occasions where ground water is abundant or the local rainfall islarge; the dry ice cracking technology is applied to operation in water-rich foundation pits, drying of the dry ice and a catalyst is guaranteed, and the guarantee is provided for the good blasting effect; and the structure is