The invention relates to a lamp atomizing assembly capable of being opened and closed. The lamp atomizing assembly comprises a main board and a light-transmitting lens arranged on the main board, wherein the main board comprises a front face and a back face; the lamp atomizing assembly further comprises a guide rail device, multi-stage atomizing sheet assemblies and a motor, wherein the guide raildevice is arranged on the main board, the multi-stage atomizing sheet assemblies can move on the guide rail device and the motor drives the guide rail device. The multi-stage atomizing sheet assemblies are arranged adjacent to each other, and magnetic attraction areas mutually attracted are arranged at the joints of the multi-stage atomizing sheet assemblies. The guide rail device is arranged onthe main board so that the atomizing sheet assemblies can slide on the guide rail device, and the atomizing effect can be further started and stopped. The lamp atomizing assembly capable of being opened and closed is simple to operate, can realize remote control over the atomizing effect according to relevant programs preset on the main board, the opening and closing time is short, and the quick switching of on and off of the atomizing effect can be realized.