Pressure sensor assembly and touch pen

The utility model discloses a pressure sensor assembly and a touch pen. The pressure sensor assembly comprises an elastic element, an elastic element fixing plate, a strain gauge, a fixing sleeve and a force transmission piece, the elastic element comprises a first plate, a second plate and a third plate, the first plate is parallel to the third plate, one ends of the first plate and the third plate are vertically connected with the second plate, the other ends of the first plate and the third plate are vertically connected with the elastic element fixing plate, the elastic element fixing plate is parallel to the second plate, and the elastic element and the elastic element fixing plate form a rectangular frame type parallel beam sensor; the second plate or the elastic element fixing plate is fixedly connected with the inner wall of the fixing sleeve; the strain gauge is arranged at the top of the first plate or the bottom of the third plate; the force transmission piece comprises a force transmission block a