High-definition multimedia interface (HDMI) matrix switcher

The utility model discloses a high definition multimedia interface (HDMI) matrix switcher, which comprises a matrix switcher main body, the matrix switcher main body comprises an outer shell arranged on the outer side, a heat dissipation window is arranged on one side of the outer shell, a dustproof net is arranged in the heat dissipation window, and mounting grooves are symmetrically arranged on the inner side of the heat dissipation window. A reset spring is fixedly mounted on the inner side of each mounting groove, and one end of each reset spring is fixedly connected with a limiting check block. The dustproof net is arranged in the heat dissipation window, the limiting check block is pushed to compress the reset spring, the position of the dustproof net is limited by falling off of one end of the limiting check block, and therefore the dustproof net can be conveniently detached from the interior of the heat dissipation window, cleaning is convenient, and the heat dissipation effect cannot be affected. 本实用