The positioning time-consuming of the Differential Global Navigation Satellite System (DGNSS) Real Time Kinematic (RTK) technology almost depends on the Kalman filter implementation. More filter rank brings bigger computation requirements and more time-consuming. Whereas when small time-consuming is needed and poor workstation setup is existing, dynamic satellite-limited algorithm can effectively reduce time-consuming of RTK to the needed. The results of motion platforms test show that the improved RTK positioning time-consuming is about 2 times less than before.