A glue coating device is for coating glue on a work piece. The glue coating device includes a main body defining a number of vents, a mounting space, a dipping space and a channel communicating the mounting space with the dipping space, the dipping space is for dipping the work piece to coat the work piece; a container defining a receptacle in a first end thereof and a glue injecting hole in the second end, the first end of the container releasably mounted in the mounting space. The vents allow air to circulate between the mounting space and the atmosphere.