A computer information anti-theft device

The invention relates to the technical field of computer information theft prevention, in particular to a computer information anti-theft device. The device comprises a mainframe box, an anti-collision shell is arranged on the outer side of the main case, a heat dissipation window is arranged on the mainframe box; a panel notch is formed in the mainframe box; a multimedia external interface is arranged in the notch of the panel; a cover plate is arranged on the panel notch; a lock head is arranged on the cover plate; a clamping groove is formed in the notch of the panel; a lock cylinder is arranged on one side of the clamping groove; an accommodating groove is formed below the panel notch; a starting button is arranged in the containing groove, a first sliding plate and a second sliding plate are arranged on the two sides of the containing groove respectively, a telescopic rod is arranged on one side of the first sliding plate, an electric air cylinder is arranged at one end of the telescopic rod, a fingerpri