A door hinge device, comprising a hinge base to which a door is rotatably connected, wherein the door hinge device further comprises an auxiliary door-closing mechanism, the auxiliary door-closing mechanism comprises a shell secured to the door, an elastic member bringing the door to close automatically during closing of the door, a sliding member disposed at one end of the elastic member adjacent to the hinge base, and a guiding member for guiding the sliding member to move in a deformation direction of the elastic member during opening and closing the door; an end of the elastic member away from the hinge base is connected to the shell, a peripheral edge of the hinge base provided with a guiding bevel; the elastic member is in a compressed state when the sliding member moves along the guiding bevel, the auxiliary door-closing mechanism further comprises a linear compression damper, one end of the linear compression damper is connected to the sliding member, the other end is connected to the shell, and an axial extension direction of the linear compression damper is the same as the deformation direction of the elastic member, characterized in that the hinge base comprises a fixing portion and a hinge base body connected to the fixing portion to cooperate with the door, wherein a peripheral edge of the hinge base body is concavely provided with an accommodating part for receiving the sliding member when the door is in a closed state, the guiding bevel extending obliquely forward from a front end of the accommodating part toward close to the auxiliary door-closing mechanism; wherein the sliding member comprises a fixing base abutting against the elastic member, a roller, and a rotating shaft that rotatably connects the roller to the fixing base, the roller rolling along the guiding bevel during opening and closing the door; wherein the shell comprises a first wall fixed to the door, a second wall disposed opposite to the first wall, a connecting wall located at a side away from the hinge base and configured to connect the first wall with the second wall, the first wall and the second wall are respectively located on upper and lower sides of the horizontal plane where the hinge base body lies; and wherein the guiding member comprises a first bump and a second bump arranged on both ends of the rotating shaft, the first wall is provided with a first sliding groove mating with the first bump and extending in a deformation direction of the elastic member, the second wall is provided with a second sliding groove mating with the second bump and extending in a deformation direction of the elastic member. state, the guiding bevel extending obliquely forward from a front end of the accommodating part toward close to the auxiliary door-closing mechanism; wherein the sliding member comprises a fixing base abutting against the elastic member, a roller, and a rotating shaft that rotatably connects the roller to the fixing base, the roller rolling along the guiding bevel during opening and closing the door; wherein the shell comprises a first wall fixed to the door, a second wall disposed opposite to the first wall, a connecting wall located at a side away from the hinge base and configured to connect the first wall with the second wall, the first wall and the second wall are respectively located on upper and lower sides of the horizontal plane where the hinge base body lies; and wherein the guiding member comprises a first bump and a second bump arranged on both ends of the rotating shaft, the first wall is provided with a first sliding groove mating with the first bump and extending in a deformation direction of the elastic member, the second wall is provided with a second sliding groove mating with the second bump and extending in a deformation direction of the elastic member.