Expansion card installation device

The utility model provides an expansion card installation device, this expansion card installation device includes: the casing, the inside installation space that is provided with of casing, graftingportion, grafting portion sets up in installation space's bottom, is provided with the inserting groove in the grafting portion, extension portion, extension portion include mounting structure and setup the expansion card on mounting structure, and mounting structure can lock in grafting portion, when mounting structure locking was in grafting portion, the expansion card was pegged graft in the inserting groove, relieved when locking when mounting structure and grafting portion, and the expansion card breaks away from the inserting groove, control part, control part are installed on the outerwall of casing for the control installation structure is with the locking of grafting portion or relieve the locking. When the user needs to be changed the expansion card, only need to carry out unblock at the outside control