Traditional approach and landing guidance equipments are difficult to meet the urgent needs due to their poor flexibility.Thereforewe studied the continuous navigation project based on DGPS/SINS tight integration according to airplanes requirement to the navigation parameters in the process of approach and landing.In the condition of good GPS signalthrough building up difference base station and transmitting observation data such as pseudorange to rover stationthe DGPS and GPS/SINS tight integration algorithm was processed in receiver terminal.In the case of no satellite signalthe velocity information from SINS was used as observation for dead reckoning the relative positionand the navigation parameters needed for landing were acquired.The experiment results indicate that this method can obtain continuous relative positionvelocity and attitude with high accuracy for airplane approach and landingwhich is useful for practical application.