The invention discloses a smooth blasting loading device. A smooth blasting explosive roll is sleeved with the smooth blasting loading device and it is guaranteed that the explosive roll is located onthe blasthole axis. The smooth blasting loading device comprises two opening rings and two connecting rods. Fixing holes are symmetrically formed in the inner rim of each opening ring, and three uniformly-distributed protruding points are arranged on the outer rim of each opening ring. The two ends of each connecting rod are correspondingly connected with the fixing holes in the same position ofthe two opening rings. By the adoption of the device, the explosive roll is uniformly distributed in the hole axis direction, the purpose of uniform loading is achieved, the two connecting rods symmetrically distributed on the explosive roll can form symmetrically-distributed semicircular grooves on the explosive roll, and the cumulative effect is generated. By the adoption of the device, no blasthole center positioning device is needed for positioning, the tedious operation that the explosive roll is positioned through explosive roll bamboo chips is not needed, and the operation is easy and fast.