In order to investigate the variation rule of cone tip resistance along depth in layered soil, a spherical cavity expansion solution in concentrically layered soil is developed based on the classical cavity expansion theory. The influence of dilation angle and the parameters of different soil layers is considered. By comparing the cavity expansion in concentrically and horizontally layered soil, here it is assumed that when the probe is located in the interface of soil layers, the deformation of surrounding soil can be regarded as a spherical cavity expansion in another kind of homogeneous soil. Based on this assumption, a simple evaluation method of cone tip resistance along the depth is obtained. The results show that this method can provide a more intuitional and accurate result compared with several existing methods. In the case of two-layer soil, the estimates are close to the finite element method results, but there is a certain deviation in the case of thin-layer soil.