The functionalized hyper-cross-linked polymers (HCLPs) with high Bninauer-Emmett-Teller (BET) surface area (S-BET) were promising porous materials while their facile fabrication remains a challenge. Herein, a universal strategy was developed for chloromethylated polystyrene (CMPS) according to the nucleophilic substitution and Friedel-Crafts alkylation, and a series of O-enriched HCLPs was fabricated accordingly. The nucleophilic substitution offered plentiful oxygen to the polymers, and the Friedel-Crafts alkylation provided the polymers with hyper-cross-linking frameworks with a unique hierarchical porosity. The resulting polymers had high S BET 's up to 601 m(2)/g and abundant oxygen (up to 13.04 wt %). They exhibited promising adsorption properties for aniline from aqueous solution with a maximum capacity (q(max)) of 223.7 mg/g. In particular, the unique hierarchical porosity of the polymers endowed the fast diffusion of aniline in the kinetic adsorption. This universal synthetic protocol is of great importance for the fabrication of some other functionalized HCLPs.