Automatic opening device for packaging bag

The utility model provides an automatic opening device for a packaging bag, which comprises a cuboid-shaped fixed base, and two ends of the upper part of the fixed base are connected with a first opening strutting piece and a second opening strutting piece in a sliding manner; the first opening distraction piece and the second opening distraction piece are composed of the same structure and are symmetrically arranged; a driving air cylinder is arranged between the first opening expanding piece and the second opening expanding piece, and a top plate used for bagging and supporting is arranged above the driving air cylinder. The top plate is fixedly installed at the top of the side support, the top plate can support a packaging bag filled with articles, and the packaging bag is prevented from falling off from the first opening expanding piece and the second opening expanding piece. 本实用新型提供一种包装袋自动化开口装置，包括固定底座设置为长方体状，该固定底座上方的两端滑动连接有第一开口撑开件和第二开口撑开件；所述的第一开口撑开件和第二开口撑开件采用相同结构组成，并呈对称式设置；所述的第一开口撑开件和第二开口撑开件之间设置有驱动气缸，且在驱