ZigBee localization algorithm based on signal strength is studied, based on Received Signal Strength Indication (RSSI) localization algorithm. Through the known reference node position in the global coordinate system and the signal strength between each reference node, the coordinate position of the blind node is obtained through analysis and calculation, that is, the current coordinate position of the indoor mobile robot. Through experimental research and data analysis, can make use of ZigBee low power consumption and network stability and other characteristics to have further understanding and application in the field of indoor positioning.