The invention provides a detection device for coated glass, which includes a frame, support legs, baffles, stand, beams, limit switches, control box, host, alarm, detection board, power emitter probe and power receiver For the probe, the four corners of the bottom of the rack are bolted to support legs; Bolted connections have baffles. According to the setting of adjustable pull rod, fixed sleeve, square head bolt, adjustment cap, clamping seat, clamping plate, clamping bolt and anti-damage block according to the length and thickness of the coated glass, loosen the square head bolt and hold the adjustment cap Adjust the position of the adjustable pull rod inside the fixed sleeve, loosen the clamping bolts, place the coated glass between the clamping seats and between the clamping plates, drive the anti-injury block to rotate through the clamping bolts, clamp the coated glass Tighten, and finally lock the lag bolts, and the detection operation can be carried out.