The invention relates to a safety-type spring intensification shot blasting machine, which comprises a shot blasting cleaning chamber and a shot blasting device, wherein a steel shot classifier is fixed above the shot blasting cleaning chamber; the longitudinal two sides of the shot blasting cleaning chamber are provided with an auxiliary chamber respectively; a set of steel shot flow curtain sealing device is arranged in each auxiliary chamber and comprises a box body with an upper opening and a lower opening; the upper opening of the box body is connected with a steel shot separator; a shot flow channel which is fixedly connected with the upper opening is formed in the box body; a material control mechanism is arranged at the outlet of the shot flow channel; a flow guide box body is arranged below the lower opening of the box body; and an adjustment mechanism is arranged at the outlet of the flow guide box body. In the invention, a novel steel shot flow curtain sealing device is used, steel shots which are circulated inside the shot blasting machine are used to form a steel shot curtain in the shot blasting cleaning chamber, and a good sealing property is realized, so that the steel shots can be effectively prevented from hurting people by splashing, and the shot blasting machine is safe and reliable.