The invention relates to a time division-long term evolution (TD-LTE)/time division-synchronous code division multiple access (TD-SCDMA) radio-frequency front transmitter-receiver system, which is characterized in that one output of a radio-frequency front circuit is connected with a baseband processor, the other output of the radio-frequency front circuit is connected with a signal input end of a single-pole four-throw switch respectively through a first power amplifier and a second power amplifier, one input end of the radio-frequency front circuit is connected with a signal output end of the single-pole four-throw switch and a second antenna, the other input end of the radio-frequency front circuit is connected with the baseband processor, and the single-pole four-throw switch is connected with a first antenna. The radio-frequency front circuit comprises a receiver, a transmitter and a frequency synthesizer, wherein the signal input end of the receiver is respectively connected with the signal output end of the single-pole four-throw switch, the second antenna and the output end of the frequency synthesizer, and the signal output end of the receiver is connected with the baseband processor; and the signal input end of the transmitter is connected with the baseband processor and the frequency synthesizer, and the signal output end of the transmitter is connected with the signal input end of the single-pole four-throw switch respectively through the first power amplifier and the second power amplifier. Due to the adoption of the TD-LTE/TD-SCDMA radio-frequency front receiver-transmitter system, the system complexity is reduced, the system cost is reduced, and the performance is improved.