The invention discloses a computer main chassis mounting base good in stability. The computer main chassis mounting base good in stability comprises a base, wherein fixing blocks are symmetrically arranged on left and right sides of the base, and each fixing block is provided with a threaded hole and a screw rod which is matched with the threaded hole; the lower end of each screw rod is fixedly provided with a universal wheel, and a handle is arranged at the upper end of each screw rod; an installation cavity is formed in the upper end surface of the base, and a support platform is arranged in the installation cavity. The computer main chassis mounting base good in stability has the advantages of being simple and reasonable in structure, and when a device needs to be carried, the universal wheels need to descend so that the entire device can be lifted so as to facilitate carrying of the device; when the device is placed at other times, the universal wheels need to rise, so that the lower end surface of the base comes in contact with the ground, the stability of placing of the device can be ensured, and meanwhile through the device, the cooling effect of a computer body can also be improved; besides, through the device, the purpose of tight holding can also be achieved by utilizing the weight of the computer body, and the practicability is high.