The present invention provides a coffee tamper, comprising a casing. A driving device is arranged on the inner top of the casing, connected to a tamping device and used to drive the tamping device to press down and move up. The tamping device is used to press down a container filled with coffee powder and comprises a main shaft, the driving device is connected to the upper end of the main shaft, and a tamping head is connected to the lower end of the main shaft and can be pressed into the container; and in one of embodiments, a container pressing head is sleeved on outside of the tamping head and has an outer cover sleeved on outside of the tamping head, the lower edge of the outer cover is located on the same horizontal plane and presses against the upper edge of the container, and the tamping head can move up and down relative to the container pressing head. The present invention provides a novel coffee tamper, which can overcome defects of existing equipment, apply uniform pressure on coffee powder and make flat coffee powder.