Coexistent method for LTE TDD system and TD-SCDMA system

The invention discloses a coexistence method of systems, comprising the steps: a LET TDD system acquires the DUSP (downlink to uplink switching point) information of a TD-SCDMA system as well as the UDSP (uplink to downlink switching point) information of the TD-SCDMA system; the LTE TDD system aligns the UDSP of the system and the UDSP of the TD-SCDMA system, as well as the DUSP of the system with the DUSP of the TD-SCDMA system. The method moves the UDSP in the LET TDD system to a position aligned with the UDSP of the TD-SCDMA and then moves the DUSP in the LTE TDD system to a position aligned with the DUSP in the TD-SCDMA system, thus effectively solving the problem that the interference between systems is generated when two systems are in adjacent frequency and shared address and realizing the coexistence of systems.