Length-adjustable support chip

The utility model discloses a length-adjustable supporting sheet which comprises a first outer sleeve fixing part and a first inner sleeve movable part. The first jacket fixing part comprises at least one first ribbed tube and a first fixed connecting tube; one end of the first rib tube is connected with the fixed end connecting tube; the first inner sleeve movable part comprises at least one second ribbed tube and a second fixed connecting tube; the first end of the second ribbed tube is inserted into the first ribbed tube through the other end of the first ribbed tube, and the insertion length can be adjusted; and the second end of the second ribbed tube is connected with the second fixed connecting tube. As the length of the support sheet can be adjusted, the length of the support sheet can be flexibly adjusted to adapt to the size of a field pit. And by adjusting the length, the supporting effect on the pit arm can be enhanced, the firmness can be improved, looseness caused by long time is avoided, and th