The invention provides a crystal oscillator packaging machine. The crystal oscillator packaging machine comprises a hopper used for storing crystal oscillators, a sorting strip belt, a driving wheel,a stopping block, an air inlet pipe, an air inlet valve, a positive pressure cavity, a material lacking detection device and a bubble cap strip; and the material lacking detection device comprises anair inlet horn mouth, an elastic film, photoelectric correlation sensors and a hollow channel, wherein the air inlet horn mouth is arranged at the left end of the material lacking detection device, the hollow channel is arranged at the right end of the air inlet horn mouth, the elastic film is arranged between the air inlet horn mouth and the hollow channel, and the photoelectric correlation sensors are arranged on the portions, close to the elastic film, of the inner wall of the hollow channel. If grooves of the sorting strip belt are not filled with the crystal oscillators, when the groovespass through the positive pressure cavity, air of the positive pressure cavity enters the material lacking detection device through holes, the air applies rightward pressure to the elastic film, the elastic film protrudes rightwards and blocks pulse signals sent by the transmitting terminals of the photoelectric correlation sensors, therefore, the receiving terminals of the photoelectric correlation sensors can not receive the pulse signals sent by the transmitting terminals, and then it is detected that the grooves of the sorting strip belt lack the materials.