The invention discloses a high initial adhesion solvent type two-component polyurethane adhesive and a preparation method thereof. The high initial adhesion solvent type two-component polyurethane adhesive is composed of a glue A and a glue B. The glue A adopts adipic acid, isophthalic acid and diethylene glycol as the raw materials, uses L-16 as the catalyst, and the reaction system needs nitrogen protection; and the glue B is prepared by: putting TDI, MDI-50 and ethyl acetate in a four-necked flask, when the temperature rises to 45DEG C, adding trimethylolpropane, carrying out exothermic reaction, performing cooling, after 30min, adding trimethylolpropane again, also controlling the temperature at 78DEG C, and carrying out heat preservation reaction for 3h. The high initial adhesion solvent type two-component polyurethane adhesive has the advantages of: good initial adhesion, post-curing strength and ageing resistance. The preparation method has the advantages of: easily controllablepreparation technological parameters and environment-friendly preparation process.