Square screening machine is a vibrating screen device around its center of gravity to the vibration. The vibration is generated by motor generator shaft rod Ministry and the bottom of the eccentric weight. The top of the weight block is rotated to produce vibration in the horizontal plane, resulting in the material through the sieve cloth to move to the edge. The lower part of the role of the weight block is to enable the machine to tilt, causing the vibration in the vertical direction and being cut. Fast relative to the lead angle of the upper part of the weight of the block, the lower part of the weight spiral screening morphological changes of control. The operator can set the material through the sieve cloth speed and spiral patterns, in order for any screening products provide maximum processing capacity and screening efficiency ... wet material or dry material ... heavy or light. .. of coarse or fine ... hot or cold.