Preparation of interpenetrating network of new multivariate super absorbent composite materials at room temperature not only reduces the production cost but also well for mass production.Using acrylic acid and acryl amide as monomer, diatomite as additive, add the polyvinyl alcohol as crosslink modified agent, polyhydric super absorbent composite was synthesized by aqueous solution polymerization under room temperature. Through the orthogonal experiment, the obtained adsorption ratio of composite is 1 423 g／g and 0.9 % NaCl absorbing rate is 106 g／g, and taking the most superior combination as the foundation, through single factor experiment, the effects of initiator, cross linking agent and degree of neutralization etc. on the water absorbing rate were emphatically studied. The results show that when initiator amount is 0.30%~0.40%, cross linking agent is 0.04%~0.06%, neutralization is 75%, the absorbency of composite is the best.