The utility model discloses a traction mechanism, including two at least hydraulic support, be equipped with a power device between the two adjacent hydraulic support, hydraulic support includes base and two back timbers, is equipped with the portal frame between two back timbers and the base, it articulatedly between back timber and the base of portal frame both sides has the 2nd power device to lie in, the portal frame is including setting up the support body on the base, and equal vertical slidable mounting has the guide post that sets up on the back timber in the support body, still is equipped with pulley mechanism on the support body, the upper reaches after all hydraulic support connect through a power device are equipped with the pulling equipment, haulage rope pile warp pulley mechanism on the pulling equipment. Realized being located the pulling equipment at hydraulic support both ends and the transition between the coal -winning machine through pulley structure, avoided the coal -winning machine to glide by oneself at the inclined coal seams during operation, guaranteed the normal work of coal -winning machine, played support and guide effect to the haulage rope moreover, simultaneously, hydraulic support bears yawing force, twisting resistance and support intensity and has all obtained improving by a wide margin.