According to the generalized Routh's equations in Poincare-Chetaev variables proposed by Rumyantsev,the symmetries and the conserved quantities of the equations were studied by using the method of infinitesimal transformation.The exixtence condition and the form of the conserved quantities were obtained.This result is more general than the past corresponding conclusions for Poincare-Chetaev equations.Two examples were given to illustrate the application of the results.