The invention provides a single node indoor positioning method based on the Chinese remainder theorem and multi-antenna trilateral positioning, relates to the single node indoor positioning method based on the Chinese remainder theorem and multi-antenna trilateral positioning, and aims at solving the problems that present fingerprint map positioning requires deployment of a lot of positioning nodes in the positioning environment in advance and acquisition of the fingerprint map, which consumes a lot of material resources and financial resources, greatly limits popularization of the indoor positioning system and has large error in implementation of single node positioning. The process comprises the steps that frequency hopping of an indoor positioning system receiver and transmitter occurs for N times, and the indoor positioning system receiver obtains N sets of channel state information; phase information in the channel state information of the indoor positioning system receiver is acquired; error elimination is performed on the obtained phase information in the channel state information; the phase information after error elimination is processed by using the Chinese remainder theorem so as to obtain transmission distance; and the client position is solved from the transmission distance obtained in the step three based on trilateral positioning. The single node indoor positioning method is used for the field of indoor positioning.