The invention discloses a plane six-bar web member joint plate connecting structure of a tower crane. The plane six-bar web member joint plate connecting structure comprises two sleeving frame main limbs (1) positioned on the two sides, a cross beam web member (3) and four plane web members (2), wherein a lug plate is fixedly connected on each sleeving frame main limb (1); each of the two ends of the cross beam web member (3) is detachably connected on the lug plate of the corresponding main limb (1); a cross beam joint plate is fixed to the center of the cross beam web member (3); four lug plates are fixed on the cross beam joint plate; one end of each of the four plane web members (2) is detachably connected on the lug plate of the corresponding main limb (1), and the other end of each of the four plane web members (2) is detachably connected on the corresponding lug plate of the cross beam joint plate; and besides, the cross beam web member (3) and the plane web members (2) form a plane six-bar form. During loading and shipment, the plane composed of a sleeving frame and the web members is completely detached to form a single web member form for binding and shipment, and the space is greatly saved.