The utility model belongs to the technical field of rope tensile force measurement technique and specifically relates to a big rope pulling force of oil -well rig survey sensing device and drilling rig is related to. The big rope pulling force of this oil -well rig survey sensing device include: hydraulic pressure sensor, pneumatic cylinder and mount, the pneumatic cylinder is connected with the mount, be used for between pneumatic cylinder and the mount wearing to establish waiting to detect the rope, hydraulic pressure sensor is connected with the pneumatic cylinder for detect the pressure of the hydraulic oil in the pneumatic cylinder. The utility model provides a tensile force measurement device, the cooperation through hydraulic pressure sensor and pneumatic cylinder makes and is usedfor detecting the pulling force size of waiting to detect the rope. The utility model provides a tensile force measurement device is applicable in the tensile detection of the big rope of rig, and the user wears to establish with the big rope of rig and as above use can between mount and pneumatic cylinder. Can know on by, the utility model provides a can be used to measure the tensile tensile force measurement device of the big rope of rig.