A hitch-ball type carry device comprising: a base having a reception member which has two side plates, a fixing hole defined in each of the two side plates; a clamp unit having a guiding member and two through holes; a support unit having a bar, a positioning part and a support frame, the positioning part and the clamp unit connected to the base, the positioning part having two pivotal holes on two sides thereof and the two pivotal holes are located corresponding to the through holes of the clamp unit and the fixing holes of the base, a pin extending through the fixing holes, the through holes and the pivotal holes, and the clamp unit and the reception member adapted to be separated from or mounted to a hitch ball by pivoting the support frame to operate at least one link unit connected to the base, characterized by the fact that the base further has an adjustment hole and a curved slot defined therein; the device further comprises at least two link units and each link unit having a fixing plate, a first link and a second link, each of the fixing plates having two first holes defined in two ends thereof, each of the first links having two second holes defined in two ends thereof, each of the second links having two third holes defined in two ends thereof, a pin extending through the overlapped first, second and third holes, the at least two link units connected to two sides of the side plates of the base, another pin extending through the first hole in one of two ends of each of the fixing plates and the adjustment hole of each of the side plates, yet another pin extending through the overlapped first, second and third holes and the curved slot of each of the side plates; the clamp unit further has two pivotal holes a pin extending through the pivotal holes and the third holes of two respective free ends of the second links, and a pin extending through the fixing hole of the bar and the second holes of two respective free ends of the first links. a base having a reception member which has two side plates, a fixing hole defined in each of the two side plates; a clamp unit having a guiding member and two through holes; a support unit having a bar, a positioning part and a support frame, the positioning part and the clamp unit connected to the base, the positioning part having two pivotal holes on two sides thereof and the two pivotal holes are located corresponding to the through holes of the clamp unit and the fixing holes of the base, a pin extending through the fixing holes, the through holes and the pivotal holes, and the clamp unit and the reception member adapted to be separated from or mounted to a hitch ball by pivoting the support frame to operate at least one link unit connected to the base, characterized by the fact that the base further has an adjustment hole and a curved slot defined therein; the device further comprises at least two link units and each link unit having a fixing plate, a first link and a second link, each of the fixing plates having two first holes defined in two ends thereof, each of the first links having two second holes defined in two ends thereof, each of the second links having two third holes defined in two ends thereof, a pin extending through the overlapped first, second and third holes, the at least two link units connected to two sides of the side plates of the base, another pin extending through the first hole in one of two ends of each of the fixing plates and the adjustment hole of each of the side plates, yet another pin extending through the overlapped first, second and third holes and the curved slot of each of the side plates; the clamp unit further has two pivotal holes a pin extending through the pivotal holes and the third holes of two respective free ends of the second links, and a pin extending through the fixing hole of the bar and the second holes of two respective free ends of the first links.