One kind of rate of fluid flow adjusting device, including the outer covering, installs in the outer covering the electrically controlled valve body and the control electrically controlled valve body movement control circuit board, states the electrically controlled valve body to include the coil, the skeleton, the magnetic core good support, the ball arm of force and the magnetic core stick, outside the skeleton circles the coil, the coil causes the welding control circuit board, for the skeleton center magnetic core good support through two designs balls arm of force with the skeleton company is a body, a magnetic core stick end loads fixes on the magnetic core good support, the magnetic core stick another end surface pastes is useful coats the idle talk to the control electromagnetic screen to open / shutting down gas bag, The outer covering is the electromagnetism screening can, the control circuit board surface has the shield level, on the electrically controlled valve body fixed once more control circuit board, has the electromagnetism screening can and the seal electromagnetic screen gap control circuit board permanent connection constitution electromagnetism entire screening can. Uses this invention, screening can eliminated the electronmagetic interference through the electromagnetism, the electric circuit control section and the product design is a body, big simplified the product zero number of articles, reduced the production cost, is the production is easier to manage the control, makes the product reliability greatly to enhance.