The invention discloses a germ extraction machine with an adjustable vibration screen. The machine aims at solving the problem that a vibration screen is likely to be displaced in the use process. The germ extraction machine with the adjustable vibration screen comprises an air suction system, a feeding mechanism, the vibration screen obliquely communicated with the feeding mechanism and a discharging mechanism located below the vibration screen and communicated with the vibration screen and further comprises a base located below the vibration screen. Two vertical boards are arranged at the portions, on the two sides of the vibration screen, on the base. Square guide holes are formed in the two vertical boards and are opposite to each other. A movable board capable of moving horizontally penetrates the two square holes. An installation board is fixed to the movable board. An installation groove is formed in the installation board. A strip-shaped installation seat is arranged at the lower portion of the vibration screen and located in the installation groove.