The blade box comprises a shell and a pressing part, a pressing part installation opening is formed in the shell, the pressing part is inserted into the pressing part installation opening and is movably connected with the shell, a blade push-out plate is arranged in the shell, and the pressing part is in transmission connection with the blade push-out plate. Compared with the prior art that after the blade is pushed out, the blade can be pushed out next time only by manual reset of a user, and a safety structure is lacked at a blade outlet, the blade box has the advantages that the pressing part reset spring is arranged below the pressing part, the pressing part can automatically reset after the blade is pushed out every time, and the blade can be pushed out conveniently. And the blade limiting block is arranged at the opening position of the blade box, so that the blade cannot be taken out of the blade box under the condition that the blade is not taken, and the safety is improved.