Abstract: An efficient calculation method of ρoriented Green’KG-*3s function for cylindrically stratified media is proposed in this paper. Firstly, the spectral Green’KG-*3s functions in cylindrically stratified media are listed, and then by means of generalized pencil of function (GPOF), the spectral Green’KG-*3s function is successfully translated into the closedform spatial Green’KG-*3s function, particularly, the integral path in GPOF is modified based on the reference［45］, so it effectively overcomes the drawbacks of the traditional methods, such as the difficulty of selecting parameters and bad stability, and realizes the purpose of fast calculation. In addition, to resolve the singularity and slow convergence of Green’KG-*3s function in the attachment point between the probe and the patch, twostep envelope extraction method is proposed. The calculated results show the effectiveness of the proposed method, so it provides theoretic bases for analysis of probefed cylindrically conformal microstrip antenna by method of moments (MOM). 