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A lamina emergent elevator mechanism was designed based on the principle of micro-elevator mechanism. Pseudo-rigid-body model of the elevator mechanism was established. The calculation formula of force-deflection relationship was derived based on the principle of virtual work. A lamina emergent elevator mechanism with LET hinge and LOOP hinge was designed and two kinds of elevator mechanism were studied. The bending and torsional equivalent coupled stiffness of LOOP flexible hinge which contains arc segment was studied and the calculation formula of the equivalent coupled stiffness was derived. The analysis of theoretical calculation and finite element simulation of the two designed examples showed that the theoretical calculation formula and the simulation model were correct. A physical model of the elevator mechanism based on LOOP flexible hinge was established and its function was tested. Calculation, simulation analysis and test results prove that this elevator mechanism can produce large lifting capacity with high accuracy in operating state and the slider displacement of the elevator mechanism has good input and output relationship with the rising displacement of the platform. The goal of design was reached.