The invention provides a protective and firm push pressing structure of an automobile rear door glass packing rack. The protective and firm push pressing structure can firmly press glass during transport and is applicable to glass of different sizes, is great in universality and is low in cost. The protective and firm push pressing structure comprises a support in the structure of a frame body; rear stand pillars on the two sides of the rear side of the support are connected with a rear cross rod; slide rails are fixed between the rear cross rod and a rear top rod on the rear side of the support; rubber backing blocks are fixed in the slide rails via connecting bolts; a supporting plate is connected between a front stand pillar and the rear stand pillar at the two ends of each of the two sides of the support; a stop rod is fixed to the supporting plate on one side via support rods protruding out from the two ends thereof; the inner end surface of the stop rod is provided with a toothed bar; the supporting plate on the other side is fixedly provided with shaft bases; a pressing device is connected with the inner sides of the shaft bases.