The utility model relates to the related technical field of automatic packaging, in particular to a tensioning type bag feeding mechanism and a slide
packaging machine, which comprise a mounting frame and a conveying mechanism arranged on the mounting frame, and a first adsorption part is arranged at the conveying
tail end of the conveying mechanism; a supporting frame is fixedly mounted on the mounting frame, and a second adsorption part is arranged on the supporting frame in a sliding manner; the reciprocating moving part is installed on the supporting frame and connected with the second adsorption part, and when the second adsorption part adsorbs the other end of the opening of the packaging bag and pulls the packaging bag open, a pushing
assembly arranged on the supporting frame acts on the reciprocating moving part. The tension degree of the opening of the packaging bag is changed, the situation that due to excessive opening of the packaging bag, deformation is caused, the opening is not enough, and the slide cannot be packaged is avoided, so that the slide packaging efficiency and attractiveness are guaranteed, and the time consumed by die replacement or parameter adjustment in a traditional manual adjustment mode is avoided.