生长在岩石裂隙中的植物根系不断长大变粗，在裂隙面上对岩石施加张力，促使岩石裂隙不断变宽、延长，岩石最终发生崩解破坏。植物根劈作用是形成砂岩峰林的外力因素之一。

The root system of the plants growing in rock fissures keep squeezing the fissure faces and widening the cracks as they grow, damaging the rocks. Root wedging is one of the exogenic processes that formed the sandstone peak forest.