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 . <EOS>