The invention discloses a tool capable of being replaced easily. The tool comprises a tool handle, a connecting shaft and clamping grooves. The right side of the tool handle is connected with the connecting shaft. A shaft shoulder is fixed to the connecting position of the tool handle and the connecting shaft. A key groove is formed in the side face of the connecting shaft. Second pin holes are formed in the tool handle, and the number of the second pin holes is two. Pin shafts are installed in the corresponding second pin holes, and springs are fixed to the right ends of the corresponding pin shafts and are further arranged at the right ends of the insides of the second pin holes. Sliding blocks are fixed to the side faces of the pin shafts. Clamping keys are fixed to the left end face of the tool handle. The tool handle and a tool disk are fixedly connected through the clamping keys and the clamping grooves. The clamping grooves are formed in the right side face of the tool disk. First pin holes are formed in the outer side of the position, where the clamping grooves are located, of the right side face of the tool disk. A tool body is fixed to the tool disk through mounting bases. The mounting bases are fixed to the tool disk through bolts. Blades are arranged at the top of the tool body. By means of the tool capable of being replaced easily, full-automatic stacking and collecting operation of double-grey paperboards is realized, and production efficiency is greatly improved.