Disclosed in the present invention are a sheet
tension control device and method for a sectional warping
machine. The sheet
tension control device comprises a warping
machine body and a creel, wherein the creel is located on one side of the warping
machine body. The device is characterized in that a warping creel is provided in the creel, and a sheet tension controller and a lease rack are provided between the creel and the warping machine body; and the sheet tension controller comprises a column, a front
yarn guide device, an angle scale, friction rollers, a tension monitor, an angle
electric motor, an angle shaft and a tension self-adjusting controller. The column is located between the creel and the lease rack, and the front
yarn guide device is mounted on one side of the column that is close to the creel; the angle scale is mounted on the column, and two friction rollers are mounted on one side of the angle scale; the angle
electric motor is fixed to the column, and the angle scale is connected to the angle
electric motor by means of the angle shaft; the tension monitor is mounted between the two friction rollers; the tension self-adjusting controller is placed on the top of the column, and by comparing a
signal fed back by the tension monitor with a set value, the controller adjusts the tension on the angle scale and the friction rollers, such that the tension between various
yarn sheets can be effectively controlled to be nearly consistent; and the tension on the yarn sheets can be improved depending on different products, the total tension of sections is improved, and the overall winding tension of the warping machine is improved so as to adapt to the warping of high-strength high-modulus low-stretch products.