Quick-disassembly and quick-assembly toy gun and shooting module thereof

A quick-disassembly and quick-assembly toy gun, comprising:

• a lower gun body comprising an installation slot, a first positioner and a first limiter;
• and
• a shooting module, comprising:
• a holder comprising two assembly portions, a second positioner and a second limiter, the second positioner arranged corresponding to the first positioner, the second limiter arranged corresponding to the first limiter, the first positioner and the second positioner comprising at least one oblique guiding edge, one of the first limiter and the second limiter comprising a plurality of limiting edges;
• a trigger structure arranged corresponding to one of the two assembly portions;
• and
• a firing mechanism arranged corresponding to another of the two assembly portions and interlocked with the trigger structure;
• wherein the holder is guided by the oblique guiding edge to obliquely engage with the first positioner via the second positioner, and the holder is rotated with the first positioner as a pivot and the second limiter of the holder is limited by one of the first limiter and the second limiter via the plurality of limiting edges, thereby allowing the trigger structure and the firing mechanism to be detachably assembled inside the installation slot via the holder jointly.