The invention discloses a commonly-used percutaneous pedicle screw stick internal fixing system which comprises a pedicle screw, a longitudinal connection stick, a puncture cone, a guide pin, an expansion core, a screw setting guide sleeve, a hollow flat file, a hollow screw tap, a screw feeder, a stick holder, a screw plug holder, a screwdriver, an opening pressurizer and a torsion resistance sleeve spanner. The opening pressurizer comprises a first opening pressurization arm, a second opening pressurization arm, a first connector, a second connector and a supporting stick. The first connector and the second connector with the adjustable distance are connected to the supporting stick. The first opening pressurization arm is detachably hinged to the first connector, and the second opening pressurization arm is detachably hinged to the second connector. One end of the first opening pressurization arm and one end of the second opening pressurization arm are each provided with a clamping groove. A progressive force application mechanism is connected between the other end of the first opening pressurization arm and the other end of the second opening pressurization arm. The system can be operated flexibly, easily, conveniently and rapidly in a labor-saving mode, can achieve gradual opening or pressurization at different times, and has the powerful and effective opening or pressurization effect.