Abstract: The present invention provides a pull-rod computer bag including a bag body, internally defining a hold space; a pull rod, assembled scalably onto one side of the hold space; a roller set, assembled at one corner of the bag body; and a housing cover with a computer hold tank. The housing cover is laterally connected with the bag body, enabling opening and closing and having a faceplate and a peripheral portion, such that the computer hold tank is formed between the faceplate and peripheral portion. A buffer pad is assembled on the faceplate and a retractable side wall is assembled onto the peripheral portion of the housing cover, enabling the peripheral portion to be expanded or reduced with respect to the area. A flexible control member is used to locate the shrinking state of the retractable side wall.