Extension card installation device

The invention provides an extension card installation device. The extension card installation device includes a shell, an inserting part, an extension part and a control part, wherein the shell is internally provided with installment space, and the inserting part is arranged at the bottom of the installment space, and provided with an inserting groove; the extension part includes an installment structure and an extension card which is arranged on the installment structure, and the installment structure can be locked on the inserting part; when the installment structure is locked on the inserting part, the extension cart is inserted in the inserting groove, and when the installment structure is unlocked with the inserting part, the extension card is separated from the inserting card; the control part is installed on the outer wall of the shell and used for controlling the installment structure to be locked or unlocked with the inserting part. When a user needs to replace the extension card, only the control pa