The invention discloses a
mask net tensioning device, an
evaporation device, a net tensioning method and an
evaporation method. The net tensioning device comprises tension applying mechanisms, a guidemechanism, a
mask net shape measuring unit and a
tension control unit; the tension applying mechanisms are drive the two opposite sides of
mask nets move opposite or same to each other; the guide mechanism is used for providing guide for the movement of the mask nets; the mask
net shape measuring unit corresponds to the mask nets in position; the
tension control unit is connected with the mask
net shape measuring unit and the tension applying mechanisms. The flatness and the drooping deformation of the mask nets are measured through the mask net shape measuring unit, and the
tension control unit is used for fitting the measured data, the tensioning force to be controlled is obtained, the tension application mechanism is used for controlling the tension application mechanism, and meanwhile, the tension applying mechanisms drive the guide mechanism to move and specified tensioning forces are applied to the mask nets, so that the problem of drooping of the mask nets is solved, meanwhile,automatic adjustment and control of the tension of the mask nets are achieved, the control precision is improved, the
rejection rate and the manufacturing cost of the mask nets are reduced, and the yield is improved.