The utility model discloses a curtaining formula snatchs clamping jaw, including accessible upper end hinge dress at the terminal clamping jaw arm of big arm, the clamping jaw arm is including controlling the left arm body and the right arm body that the interval set up, the upper end of the left arm body and the right arm body is equipped with connects connecting seat between them, be equipped with big arm hinge dress hole on the connecting seat and be used for hinge dress forearm hydro -cylinder to stretch out the hydro -cylinder hinge dress hole of end, be equipped with the hinge between the lower tip of the left arm body and the right arm body, the hinge is equipped with and is used for pressing from both sides the clamping jaw device of putting the object around the swing of hinge axis on the hinge, thereby the clamping jaw device including hinge dress on the hinge and the relative preceding clamping jaw that sets up and back clamping jaw and hinge dress be used for before the drive clamping jaw to press from both sides after with clamping jaw driving oil cylinder of the preceding clamping jaw driving oil cylinder of putting the operation with back clamping jaw swing on the hinge. Should snatch the clamping jaw and can snatch the operation in -process at it to snatch the mouth automatic towards the below all the time, can improve the loading and unloading height in addition.