Abstract：We propose a station selection method for pseudolite system based on weighted horizontal dilution of precision. This method gives different weights to each station according to the relative position of station and receiver, reducing the possibility that stationsthathave large measurement error areselected to participate in positioning. We analyze the mathematical models of pseudo-rangemeasurementerror, and the WHDOP expression is analyzed in detail. Station selection based on the contribution of WHDOP is designed. The simulations reveal that the method can select stations efficiently and accurately, thereby reducing the calculation amount of the receiver and improving the positioning accuracy of the system.