The invention aims to provide a pulling device assembly which enables a pulling arm and a latch (a first connecting rod) of the pulling device to stay close even when a push door is spread. The technical scheme is that a linkage connecting rod 15 is erected between the push door 18 and a frame 16; the linkage connecting rod 15 comprises the first connecting rod 13 and a second connecting rod 14; one end part of the first connecting rod 13 is rotationally connected to one of the push door 18 and the frame 16; one end part of the second connecting rod 14 is connected to the other one of the push door 18 and the frame 16; the first connecting rod 13 and the second connecting rod 14 are connected in a manner that the distance from one end part of the first connecting rod 13 to one end part of the second connecting rod 14 can be flexible; the pulling device 21 is mounted onto the certain one, equipped with the first connecting rod 13, of the push door 18 and the frame 16; and the pulling arm 11 of the pulling device 21 pulls the first connecting rod 13 of the linkage connecting rod 15.