The invention discloses a method for constructing a belt-shaped tethered satellite release kinetic model, relates to the field of spacecraft control, can accurately describe complex configuration changes of the space band-shaped tether in the release process, effectively reveals the influence of the band-shaped tether with different bending stiffness on system dynamics, and accurately reflects theconfiguration changes of the band-shaped tether in the release process. The present invention comprises: a constraint equation used for uniformly dispersing the space band-shaped tether into a plurality of rigid body units, establishing a kinetic equation of a single rigid body unit and a constraint equation between the rigid body units, wherein the release length of the tether is continuously changed according to the release stage; constraint equations among rigid body units are divided into three classes of constraints between units which are not released in the main satellite, constraintsbetween rigid body units which are released and previous units, and constraints between released units, and then according to a constraint equation between the rigid body units in the releasing process, a dynamic equation of the releasing process of the belt-shaped tethered satellite system is obtained through final derivation.