The invention relates to an Internet of things node and a miniaturization integration method thereof. The Internet of things node consists of five efficient solar cells, one polymer lithium ion battery, one main control circuit board, one wireless transmission circuit and various sensors, wherein the main control circuit, the polymer lithium ion battery and the wireless transmission circuit are stacked and interconnected in an MCM (Multi Chip Module) encapsulating way; each layer is connected with an adjacent layer through a double-row 50-foot pin header 2*50; and four surrounding solar cells are connected in parallel with one solar cell covered on the top, a lithium battery is charged during the day, and power is supplied to the wireless transmission circuit through the lithium ion battery at night, so that long service life of the node is ensured. The Internet of things node is characterized in that: 1, the size is only 18 cm<3>, and the volume power density is up to 20.5Wh / l; 2, the service life of the Internet of things node is long, and the Internet of things node can continuously work normally for 28 days on cloudy days according to calculation of once data transmission per hour; 3, the power consumption of the main control circuit is low, the working current is 24muA, and the static current is lower than 1muA; and 4, the non-shielded transmission distance is 700 meters. A new thought is provided for future throwing type miniaturized Internet of things.