A computer chassis Includes a top cover, a right panel, a left panel, a base plate, folding wheels, panels and backs. A lateral plate shaft is arranged at the left and right ends of the bottom plate,a left side plate and a right side plate are pivotally connected with a bottom plate through a side plate shaft, a heat dissipation motor is arranged in the middle of the right panel, a protective netis arranged on both sides of the heat dissipation motor, fan blades are fixed on the heat dissipation motor, a protective fence is arranged around the protective net, an upper end of that left side plate and the right side plate are provide with a sliding groove, a slide block is arranged on both sides of the top cover, an upper end of that top cov is provided with a shock-proof plate, a front end of that bottom plate is fixedly connecte with the panel, a limit device is arranged in that middle of the bottom plate, a power supply interface is arranged above the right side of the bottom plate,a low end of that base plate is fixedly connected with a back plate, a pow plug is arranged on the outer side of the back plate, a base can be arranged on the low end of the base plate, a wheel shaftis arranged in the base plate, the wheel shaft is fixedly connected with a universal wheel, a fixing block is arranged on the lower end of the base plate, and a finite position plate is arranged in the middle of the lower end of the base plate. The device is convenient to install, has good heat dissipation effect, and protects the parts in the main box and the safety of users.