Bottle waste removing and sampling device and method

A bottle waste removing and sampling device comprises a waste removing channel and a waste collecting part in butt joint with the waste removing channel, the waste removing channel is sequentially provided with a first bottle blocking assembly, a second bottle blocking assembly and a sampling assembly in the conveying direction, the second bottle blocking assembly is provided with a first bottle detecting part in a matched mode, and a second bottle detecting part is arranged between the first bottle detecting part and the sampling assembly. The waste rejecting and sampling method comprises the steps that S1, bottles are fed into the waste rejecting channel, the first bottle body detection piece detects the bottle bodies, the second bottle blocking assembly blocks the bottle bodies detected by the first bottle body detection piece, the first bottle blocking assembly blocks the upstream bottle bodies, and the sampling assembly stretches into the waste rejecting channel; s2, if waste removing is needed, the samp