The invention relates to the technical field of electric fire boxes, in particular to an electric fire box capable of being manually mounted and dismounted conveniently. The electric fire box comprises a first bracing plate and a box bottom plate; the bottom end of the box bottom plate is fixedly connected with a box pad plate; the inner side of the box pad plate is provided with a first support plate; a roller is rotationally connected with the bottom end of the first support plate; the inner side of the top end of the box bottom plate is provided with the first bracing plate; the inner sideof the first bracing plate is fixedly connected with a support rod; the outer side of the support rod is rotationally connected with a bearing; the outer side of the bearing is rotationally connectedwith a solid wood strip; the two ends of the first bracing plate are slidably connected with second bracing plates; the two ends of the first bracing plate are fixedly connected with clamping boards;and the other ends of the clamping boards are fixedly connected with rotating rods. Through an arranged square rotating shaft, by pulling a fixing rod out, then the rotating shaft is rotated, the roller is rotated to the bottom end of the box pad plate, through the design, the electric fire box is ingenious in conception and easy to move, can be protected, and is worthy of research, development and popularization.