The invention discloses a reverse-quadrilateral bisectional track robot, relating to a track mobile robot, in particular to a connecting rod module comprising four track modules and a reverse-quadrilateral mechanism. The connecting-rod mechanism is beneficial to overcoming the defect of insufficient flexibility of the track mobile robot and performing the characteristic of flexibility and changeableness of a connecting-rod mechanism so as to enable the mobile robot to better adapt to changes of the traveled ground and improve the obstacle navigation performance of the mobile robot. The robot comprises a connecting-rod module (A), a first track module (B1), a second track module (B2), a third track module (B3) and a fourth track module (B4), wherein the track modules and the connecting-rodmodule are respectively provided with a motor, the connecting-rod module is a reverse-quadrilateral mechanism, the first track module and the third track module are connected with a first vehicle body (1), and the second track module and the fourth track module are connected with the second vehicle body (6). The reverse-quadrilateral bisectional track robot has the characteristics of high stability, flexibility and changeableness, is applicable to bumpy ground and has improved obstacle navigation capability.