Cold continuous rolling production line and tension control method

The invention discloses a cold continuous rolling production line and a tension control method, and belongs to the technical field of cold rolling machining. The cold continuous rolling production line comprises a continuous rolling unit, a tension assembly and a coiling machine which are sequentially arranged in the running direction of strip steel, the tension assembly comprises a plurality of tension roller sets parallel to the width direction of the strip steel, the tension roller sets are sequentially arranged at intervals in the length direction of the strip steel, and each tension roller set comprises a plurality of tension rollers for sequentially wrapping the strip steel; the continuous rolling unit, the multiple tension assemblies and the coiling machine jointly form a first running path for running of the strip steel. For products which are thin and large in Si mass fraction, the cold continuous rolling production line is adopted, hot rolling strip steel is sequentially wound on the tension rollers