The invention relates to a wireless sensor network all-moving node positioning method based on an RSSI. An existing range-based positioning algorithm is usually used for static node positioning or is used for the condition that partial nodes are moving and partial nodes are static, the RSSI range-based positioning algorithm has not been used for node positioning under the condition that all of anchor nodes and unknown nodes are in a moving state, and the existing algorithm fails to realize node positioning under the condition that the number of the anchor nodes is less than 3. The invention aims to overcome the defects of the prior art and provides the wireless sensor network all-moving node positioning method based on the RSSI. According to the invention, when the unknown nodes are in communication with four, three, two and one anchor node, different algorithms are adopted to obtain the positions of the unknown nodes.