An algorithm for solving the problem of elasticity theory for composite thin-walled shell composite structures with junction lines is proposed. The SMCM software was created based on the finite element method and the developed algorithm. A test problem was solved for a composite shell structural element of the box-plate type docked with 4 other plates. https://www.ealisboa.com/flash-grab-Hellfire-Sloe-Gin-special-find/