This invention relates to a dynamic multiplexing reception method for baseband of multi-mode satellite navigation signals, which mainly includes generating pseudocode sequences for GPS, BD, Galileo and Glonass four satellite systems; multiplex capture module, capturing signals for each satellite system channel; multiplex tracking module, detecting channel status using a polling mechanism and controlling the start of the tracking module; using the polling mechanism to complete the synchronization of all channels in each system according to the customized time slot. By using the above method, the serial polling mechanism is added in the baseband processing of multiple systems, and customized time slot multiplexing is realized for some units, thus greatly reducing the complexity of baseband processing, and greatly reducing the use of resources, significantly reducing the running power consumption and cost.