The invention relates to the textile machinery field, and especially relates to an embroidery machine part. A multi-color embroidery machine embroidery needle mechanism is provided; a plurality of needle head components are annularly arranged in a needle bar with the needle bar axis as the center, an elevating frame is mounted at the top of the needle bar, and a motor is mounted on the elevating frame; a transmission shaft is coaxially arranged in the needle bar; the transmission shaft is fixedly provided with a driving gear, each of the needle head components internally includes a driven gear, the driven gears and the driving gear are matched with each other, the driven gears in all the needle head components are located at different height levels, at most only one driven gear is meshed with the driving gear each time, and the driving gear drives a needle head in the needle head components to move up and down through the driven gear. All the driven gears have different heights, and the driving gear performs selection control on all the driven gears by varying the height, so that online color changing embroidery is realized, a multi-color pattern embroidery work can be completed through one-time positioning, and the aesthetic degree of embroidery is improved.