The utility model discloses a support needle adjusting device relates to vacuum evaporation coating technique field to the height of adjustment support needle reduces glass substrate and takes place the skew possibility of breakage even at the coating film in -process accurately. The base, its one side is equipped with breach portion, breach portion is used for holding the support needle when needle is adjusted to supporting, two height?measurement posts, its respectively vertical set up in breach portion both sides, and signal transmitter and signal receiver, signal transmitter sets up two on the height?measurement post in the height?measurement post, signal receiver sets up on another height?measurement post, signal transmitter with signal receiver is the distance separately the distance of base upper surface equals, and the two is just to setting up. The utility model provides a support needle adjusting device is arranged in the adjustment of vacuum evaporation equipment's support needle.