The present invention provides a MIMO antenna. The MIMO antenna includes a regular octagonal substrate and eight antenna components with a same structure arranged along eight edges of the regular octagonal substrate, and the eight antenna components are distributed in an annular array. The present disclosure further provides a terminal applying with the MIMO antenna. The eight antenna components in the MIMO antenna provided by the present disclosure are distributed in an annular array, so that an area occupied by the MIMO antenna in the terminal is greatly reduced; and moreover, the antenna components have good isolation therebetween and are simple in form, and the MIMO antenna has a higher bandwidth.