Disengagement preventing pressure adjusting device of winding bobbin holder of false twist texturing machine

The invention relates to equipment for yarn production, in particular to a disengagement preventing pressure adjusting device of a winding bobbin holder of a false twist texturing machine. The disengagement preventing pressure adjusting device comprises a pressurization air cylinder, a stepping motor, a magnetic valve and a controller, wherein a piston head of the pressurization air cylinder is fixed to a bobbin holder side plate through a hinge; the bobbin holder side plate is provided with a bobbin holder which is fixed through a winding hinge pin; the output end of the stepping motor is connected with a synchronous pulley through a belt, and the synchronous pulley is arranged on a transmission shaft; the transmission shaft is connected to the bobbin holder side plate and coaxially connected with a bobbin tube; the outer circle of the bobbin tube makes contact with the outer circle of a friction roll; and a stop dog is arranged at one end of the hinge pin, and the other end of the hinge pin is in threaded c