Applied test of window frames （Picea. jezoensis var. microsperrna） showed: preservatives PPA, CCB, and CCA,s, can be used in the preservation of window and door, double vacuum process was available for PPA; full cell-pressure processes with CCA,s, and CCB were suitable. Retention of the preservatives in wood were 6 kg/m ,3, and 4 kg/m,3, for windom frames and window sash Before treatment, wood material must be machined into window constructure and classified as window frames and window sash. The window frames made from impermeable species need to close-stack and cover with plastic film after treatment. Changes of wood size should be controled, if treating with water-borne preservatives.