Device with automatically changeable light propagation direction

The invention disclose a device with automatically changeable light propagation direction, comprising a box body frame. A bottom cover is arranged at the bottom of the box body frame; a plurality of through channels that are through the bottom cover are arranged in the bottom cover; a plurality of moving boxes are movably arranged in the through channels; a plurality of lenses are arranged in eachmoving box; a telescopic retainer is movably arranged at the top of each of two sides of each moving box; any of left and right framing members of the box body frame is provided with a touch displayscreen; the back of the touch display screen is provided with a controller, a light source and a camera for photographing a light source propagation path; a plurality of telescopic slide balls are arranged at the top of each of front and rear faces of the box body frame. The positions of the moving boxes are automatically adjusted through the controller, light is allowed to pass through lenses ofdifferent media, the light