Special tool for replacing rolling mill working rollers and rolling mill roller replacing trolley

The utility model provides a special tool for replacing a working roll of a rolling mill and a roll replacing trolley of the rolling mill. The special tool for replacing the working roll of the rolling mill comprises a plurality of extending tool clamps, a plurality of connecting rods and a plurality of connecting rods, the extending tool clamps are detachably installed on clamps corresponding toworking roll clamps of a rolling mill roll replacing trolley, the extending tool clamps and the clamps corresponding to the working roll clamps are arranged in a matched mode, and hooks face the samedirection so as to extend the length of the clamps; and the extended cylindrical shaft heads are detachably mounted on the corresponding cylindrical heads of the working roll clamps of the roll changing trolley of the rolling mill so as to extend the lengths of the cylindrical heads. By means of the technical scheme, when the working roll is replaced, the working roll can be directly replaced without adjusting the transver