A liquid relief gun head packaging machine comprises a loading mechanism and further comprises a feeding mechanism and a boxing mechanism; the boxing mechanism comprises a gun head taking mechanism used for taking gun heads from the position of the feeding mechanism, a gun head box platform used for containing a gun head box, an electric pushing rod used for pushing the gun head box to move on the gun head box platform, and a horizontal workbench used for carrying the gun head box platform and capable of driving the gun head box to move in two perpendicular directions; and a cover buckling mechanism is arranged on the edge of the gun head box platform. The loading mechanism completes one-by-one loading of the liquid relief gun heads; the feeding mechanism further conveys the loaded liquid relief gun heads; the gun head taking mechanism takes the liquid relief gun heads from the position of the feeding mechanism and places the liquid relief gun heads in the gun head box one by one; the electric pushing rod completes pushing of the gun head box; and the cover buckling mechanism completes cover buckling in the process. The invention provides a liquid relief gun head automatic packaging system integrating the conveying, boxing and packaging functions, manual intervention is not needed in the boxing and packaging process, and the liquid relief gun head boxing operation efficiency can be greatly improved.