Hole milling tool for block-shaped part with hole

The utility model relates to a hole milling tool for a block-shaped part with a hole. The hole milling tool for the block-shaped part with the hole comprises a strip-shaped fixing block, the fixing block is provided with a fixing structure used for being fixedly connected with a lathe workbench, and the fixing block is provided with a plurality of square grooves formed in the length direction of the fixing block at intervals; the depth of the square groove is smaller than the height of the vertical part of the block-shaped part with the hole, and the length of the square groove is smaller than the length of the horizontal part of the block-shaped part with the hole, so that the hole milling position of the block-shaped part with the hole is located on the outer side of the fixing block; a plurality of pressing assemblies are arranged on the fixing block, each pressing assembly comprises a fixing column, a pressing plate, a reset spring and a pressing nut, the lower end of the fixing column is fixedly connecte