In this paper on the basis of the theoretical solutions of the earth tide effect,barometric effect and Oceantide load effect as the boundary conditions of permeation between a well and aquifer,the internal relations of the response of the well aquifer system to three kinds of tidal signals that have different mechanisms,i.e.the response functions of the well aquifer system to tide,have been developed,which involve the amplitude response function and phase lag function of the well aquifer system.The relationship between these two functions and the parameters of the well aquifer been discussed and compared with those under no drainage.