Improved sieving machine

An improved sieving machine comprises a supporting seat, a sieving container, a motor and a feeding device. The sieving container is supported at the top of the supporting seat through a spring and provided with a sieve, the motor is connected with the sieving container through a cam connecting mechanism and drives the sieving container to vibrate, and the feeding device comprises a support, a feeding pipe, a rotating shaft, a hopper and a motor, wherein the feeding pipe is obliquely arranged on the support, the rotating shaft is rotatably disposed in the feeding pipe, the motor is connected with the rotating shaft and drives the rotating shaft to rotate, the lower end of the feeding pipe is communicated with the bottom of the hopper while the upper end is provided with a discharge opening located above the sieving container, and spiral conveying blades are formed on the peripheral surface of the rotating shaft. The improved sieving machine has the advantages of high work efficiency, fine sieving effect and t