Aiming at the control problem of glide stage to cruise stage，considering rotation of the Earth and stamping constraint and initial
state constraint of the cruise stage，control law design model has been build． Optimal control problem have been translated to nonlinear
programming problem Using Gauss pseudospectral methods． Nonlinear programming problem has been solved by SNOPT． The simulation
results show that Gauss pseudospectral methods can solve optimal control law problems of glide stage to cruise stage．