The invention discloses a shower room door frame structure. The shower room door frame structure comprises an outer side column and an inner side column, wherein the outer side column is fixed on the wall, the inner side column is connected onto the outer side column in a clamping manner, a groove is formed in the outer side column, a clamping groove is formed in the bottom of the groove, a clamping piece is arranged at the outer side of the inner side column, the inner side column is arranged in the groove and clamped by virtue of the cooperation of the clamping groove and the clamping piece, the outer side column is provided with an extension arm, bayonets are formed in the extension arm and the side wall of the groove, and the door frame structure also comprises a cover plate, the cover plate is connected with the outer side column in a clamping and matching manner by virtue of the bayonets on the extension arm and the side wall of the groove. The shower room door frame structure is reasonable in design and simple in structure; the inner side column and the outer side column are tightly connected in a clamping manner, so that convenience in installation is realized; and the surface of the outer side column is provided with the cover plate, so that the shower room door frame structure is relatively attractive.