Due to the large residual stress existing in micro-structure optical elements after GPM，the glass material D-ZK3 with low transition temperature was selected，and a finite element simulation model of micro V-grooves was developed with the software MSC.Marc.Five-element general Maxwell model was used to describe the viscoelastic properties of D-ZK3 glass at high temperatures，and the fill effect and stress distribution of micro V-grooves were simulated and analyzed under different molding parameters.The simulation results show that the maximum stress increases and filling effects are improved when the V-groove angle increases；the higher molding speed leads to higher maximum stress and molding pressure；whereas the maximum stress decreases with the increasing of molding temperature.