The spread spectrum technique is widely used in the field of aerospace TT&C systems. However, with the development of multi-channel spread spectrum and multi-station ranging technology, the TT&C systems have large effects on the accuracy of pseudo-range measurements in increasingly complex measurement environment. The strong signal interference and multiple access decline the ranging accuracy in multi-station ranging systems. A high-precision ranging technology based on parallel interfe-rence cancellation is proposed. To suppress the measurement errors caused by code division multiple access and improve the ranging accuracy, the multiple access interferences is reconstructed and canceled to obtain pure desired signals. The simulations and experiments verify that the algorithm have superior feasibility and superiority.