The invention relates to a
firecracker which comprises a shell, a
dynamite-free fuel unit and a connector unit. The connector unit is used for applying
voltage to the
dynamite-free fuel unit. The
dynamite-free fuel unit can generate expansion gas after the preset
voltage is applied to the dynamite-free fuel unit, so that expanding
pressure triggering explosion is formed. According to the
firecracker, the preset
voltage needs to be applied to the
firecracker, then explosion happens, in comparison with a firecracker with dynamite in the prior art, on one hand, storing and transporting are facilitated, the firecracker is not influenced easily by outside environment, and the potential safety
hazard is small; on the other hand, the fuel unit is a dynamite-free unit, after explosion, emission ofa large quantity of gas such as
sulfur dioxide and
sulfur monoxide is avoided, and environmental
pollution is avoided. Explosion only occurs after the voltage needs to applied to each firecracker, the
chain reaction does not occur easily, energy generated by explosion is controllable relatively, and the potential safety
hazard can be further reduced. The invention further provides a firecracker structure.