In the spatial optics remote sensor reflector subassembly has had the full coordinate contact non-linear problem.Used non-linear finite element analysis software ABAQUS in view of this question this article to carry on the structure analysis.This article revolved the reflector subassembly design characteristic to carry on the analysis.Namely:The non-linear contact question characteristic is a key point.Analyzed full parameters and so on quantity,friction coefficient to the reflector subassembly precision influence.Carried on the finite element model the establishment,the analysis,the confirmation.Determined finally this structure the reasonable interference fit is 0.08 mm.