Calcium Lignosulfonate(CL), with its good performance and cheap price, is widely used as a water reducer. But CL as a superabsorbent resin additive is not well studied. CL super absorbent resin is a kind of new macromolecular network polymer materials, containing hydrophilic groups, which could absorb a large amount of water. This paper studies its preparation process, morphology and structural characterization, and the application in soil. The synthesis of CL superabsorbents is presented. The influence of several factors on absorbency is discussed: the component of CL, the type and amount of initiator, the type and amount of crosslinker, the amount of acrylamide, the neutralization degree, and the drying conditions. Using the single-factor method, the optimum process parameters in this experiment system are obtained (in wt%): acrylic 58.5%, acrylamide 19.5%, calcium lignosulfonate 5.85%, initiator 0.39%, cross-linker 0.19%, and neutralization 15.59%. The copolymers are characterized by IR spectosocopy, thermal analysis and Scanning Electronic Microcopy(SEM). It is shown to have a good thermal stability, and the components of comonomers influence the resin's decomposition temperature and surface morphological characterization notably.