Connecting and fixing device used for being connected and fixed to building

The utility model relates to a connecting and fixing device for being connected and fixed on a building, which comprises a frame body, the frame body comprises two steel channels, and a connecting rod for connecting the steel channels is arranged in a cavity formed between the two steel channels. According to the device, a first resistance piece, a second resistance piece, a third resistance piece, a first vertical screw rod, a first transverse screw rod and a second transverse screw rod are additionally arranged on a frame body, and after the first vertical screw rod penetrates into a building to be fixed, all the parts are connected and matched with one another, so that the effect of limiting displacement of the frame body in the left-right direction and the front-back direction is achieved; and the structure is simple and practical, and the safety is improved. Besides, the first resistance piece, the second resistance piece, the third resistance piece, the first vertical screw rod, the first transverse scr