Film lack detection alarming device of film coating machine

The utility model provides a film lack detection alarming device of a film coating machine. The film lack detection alarming device comprises a stander, a film coating fixed rod, film coating conveying rollers and a controller, wherein the film coating fixed rod is arranged at the inner upper part of the stander; a plurality of the film coating conveying rollers are arranged on one side of the film coating fixed rod; the film coating fixed rod is connected with the controller through a motor; the top of the stander above the film coating fixed rod is connected with a sliding rod; the tail end of the sliding rod is arranged on the left side of the film coating fixed rod; a metal proximity sensor is mounted at the middle part of the film coating fixed rod and is connected with the controller; a limiting switch is arranged at the middle part of the stander and is connected with a time delay relay; a film lack alarming lamp and a buzzer are connected between the limiting switch and the time delay relay. The film lack detection alarming device can sound an alarm during film lack and can also stop and sound an alarm to remind an operator of replacing packaging films when the packaging films are used up. The film lack detection alarming device of the film coating machine has the advantages of shortening the working time, simplifying the film replacement working procedure and improving the packaging efficiency.