Abstract: Disclosed is an automatic ink color blending apparatus, which comprises an apparatus cabinet (1) with a carrying platform (11), an ink bucket moving platform (2) provided on the carrying platform, the ink bucket moving platform including a moving guide rail (21), a weighing device (22) and an ink bucket (23), and wherein the ink bucket is disposed on the weighing device,the weighing device is provided on the moving guide rail and moves along the moving guide rail, an ink supply tank (3) arranged above the ink bucket moving platform,and wherein the ink supply tank includes a plurality of ink supply devices (31), each of which provides inks of different chromaticity and a control terminal (4) provided on the carrying platform, which is electrically connected to the ink supply tank, the moving guide rail and the weighing device respectively, for obtaining target chromaticity information, and generating control information of ink selection to select one or several ink supply devices to inject the corresponding ch