Apexoil spraying machines are available in nozzle type and centrifugal disc type. They are competent in producing an even oil spraying effect with the volume variance less than 5%. Users can adjust the volume of the oil to be sprayed. The oil sprayer is equipped with an efficient oil mist recovery device to keep a clean production environment as well as cut the cost. A retracting device is mounted on the end of the oil sprayer unit to filter those flawed biscuits out.