Abstract: Disclosed are a valve clamping device with an adjustable bearing force and a valve clamping system. The valve clamping device with an adjustable bearing force comprises: a support portion comprising a connecting end and a free end disposed oppositely; a hollow adjustment portion made of a shape memory material, one end of which is sleeved outside the connecting end and connected to the support portion, and another end of which hangs in air; a clamping portion enclosed outside the adjustment portion; and a driving portion connected to the clamping portion to drive the clamping portion to open or close around the adjustment portion; wherein the free end of the support portion is within the adjustment portion, and a proximal end of the adjustment portion is spaced apart from a proximal end of the support portion.