The invention discloses a Christmas lamp, comprising a power supply, a control component and Christmas lamp strings. The power supply provides power to the Christmas lamp strings and the control component. Each of the Christmas lamp string is formed by 25 lamp points and the input end of the Christmas lamp string is provided with a step-down module. The Christmas lamp further comprises a WIFI module in communication with the contact person list of a cell phone. The WIFI module also converts WIFI signals into digital signals and transmits the digital signals to the control component. The control component processes the control signals and controls the Christmas lamp strings. According to the invention, through the use of wireless WIFI signals as a control carrier, without other controllers, it is possible to control the Christmas lamp directly from a cell phone. At the same time, compared with the traditional control modes using Bluetooth and RF infrared rays, the Christmas lamp boasts more groups that can be controlled together even when they are apart from each other at long distance.