A special well head device for formation test of oil and gas wells comprises an upper tee joint and a lower tee joint, wherein the upper tee joint is connected with an upper part by a flange; the lower end of the upper tee joint is directly located on the lower tee joint through a rapid buckle; and the lower end of the lower tee joint is connected with an external tube column. An inner tube column enters the outer tube column, so that the special well head device can be conveniently installed by using the rapid buckle without rotating the inner tube column and the outer tube column. After entering the inner tube column, the inner tube column is connected with the upper tee joint to close an upper path; and an annular space between the inner tube column and the outer tube column is connected with the external through a by-pass hole. According to the invention, the problem that the normal well head device only provides a single channel when the multi-energy gas-lift test tube column works is solved; the provided well head has two channels, so that the demands such as steel wire operation, circulation killing operation, and the like during the test are satisfied. The invention has the advantages of simple structure, convenience for operation and low manufacturing cost.