This unit sprays oil on the baked biscuits evenly. The volume of sprayed oil can be adjusted. The unit uses an efficient oil mist removing and reclaiming system to ensure the cleanness and hygiene of the oil spraying machine and reduce the production cost. Nozzle type and centrifugal disc type oil sprayer are available as an option. The oil dripping conveyor has a flex device to reject any unqualified biscuits after oil spraying.