Anti-theft screen window

The utility model provides an anti-theft screen window which comprises a main frame, an auxiliary frame and a screen; grooves are arranged in the upper beam and the lower beam of the auxiliary frame; the main frame is clamped in the groove; and the surface of the main frame is provided with the screen. According to the anti-theft screen window, a screen window and an anti-theft window are integrated, the anti-theft screen window is applicable to an inswinging casement window, not only are mosquitoes prevented but also theft is prevented and protection is realized, multiple prevention functions are integrated, energy is saved, the appearance is attractive, and the use is convenient.