The invention discloses an improved computer terminal device. The device comprises a connecting mechanism which is fixedly arranged in the front end face of a mainframe box and a USB (Universal SerialBus) memory which is connected with the connecting mechanism in an inserting fit manner, wherein a first sliding cavity is arranged in the front end face of the connecting mechanism; a sliding frameis arranged in the first sliding cavity in a sliding fit manner; an accommodating cavity is arranged in the front end face of the sliding frame; a first through hole penetrating through the rear end face of the sliding frame is formed in the inner wall of the rear side of the accommodating cavity; second through holes penetrating through the left and right end faces of the sliding frame are formedin the inner walls of the left and right sides of the accommodating cavity; first jacking springs are fixedly arranged on the rear end face of the sliding frame and at the left and right sides of thefirst through hole; the rear ends of the first jacking springs are fixedly connected with the rear side wall of the first sliding cavity; and a data connecting cavity opposite to the first through hole is arranged in the inner wall of the rear side of the first sliding cavity.