Solenoid valve stiffness characteristic testing device and testing method

The invention discloses a solenoid valve stiffness characteristic testing device comprising a solenoid valve assembly, a force sensor and a solenoid valve positioning device. A measuring rod is arranged on a force receiving surface of the force sensor. The solenoid valve positioning device includes a solenoid valve positioning device and a valve body fixed thread sleeve; a second positioning holeis formed in the upper end of the valve body fixed thread sleeve; and the solenoid valve positioning device is arranged in the second positioning hole and sleeves the outside of the measuring rod. Theupper end of the measuring rod extends out of the electromagnetic valve positioning device. A solenoid valve positioning surface is arranged at the electromagnetic valve positioning device. When thefirst detecting positioning surface is in contact with the solenoid valve positioning surface, a second detecting positioning surface is in contact with the measuring force receiving surface. In addition, the invention also dis