Gap-variable point type connection unlocking device and method

The invention relates to a variable-gap point type connection unlocking device and method. The variable-gap point type connection unlocking device comprises a sleeve cover, a double-thread screw, a collecting spring, a force bearing bowl, a connecting cylinder, a loading nut, a spring end cover, two cushion blocks, a cushion block torsion assembly and a separation nut. The lower end of the sleeve cover is connected with the upper end face of a connecting cylinder which is connected with an upper separating body through a flange plate. Two cushion blocks are arranged between the lower end face of the connecting cylinder and the upper end face of the separating nut. The lower end face of the separating nut is connected with the lower separating body through a flange. Two cushion block torsion assemblies are symmetrically arranged at the connecting positions of the connecting cylinder and the two cushion blocks and provide torsion force for upward overturning of the two cushion blocks, and the separation and but