Waste liquor collection device

The invention relates to a waste liquor collection device used in a production using process. The waste liquor collection device comprises a waste liquor barrel, a waste liquor collection box, a waste liquor barrel base, a lifting air cylinder, a collection pipe arm and a collection pipe, wherein the waste liquor collection box and the lifting air cylinder are separately arranged on the waste liquor barrel base; a waste liquor pipe for guiding waste liquor is communicated with the waste liquor collection box; the waste liquor barrel is arranged below the waste liquor barrel base; the collection pipe which can relatively lift sleeves a waste discharge pipe on the waste liquor collection box; the lower end of the collection pipe is a free end for being inserted into the barrel opening of the waste liquor barrel when the waste liquor is collected; the upper end of the collection pipe is connected with one end of the collection pipe arm; the other end of the collection pipe arm is connected with the output end of