P(AA/AM/APEG)/nano-SiO2 as an efficient inorganic/organic super absorbent polymer composite was synthesized by a aqueous solution polymerization method with acrylic acid (AA) , acrylamide (AM), allyl polyoxyethylene ether (APEG) as monomers, and added to nano-SiO2, with ammonium persulfate(APS) as initiator, N,N'-Methylene bisacrylamide(MBA) as crosslinking agent. The impact factors of synthesizing superabsorbent resin, such as the amount of initiator, crosslinking agent and nano-SiO2, were discussed. Fourier Transform Infrared Spectrometer (FTIR) and Scanning electron microscopy (SEM) was performed to demonstrate the physical characterization. The results showed that the resin particle size had a great influence on the water absorbent rate and the temperature had little effect on resin absorbent rate; when the particle size was 80 ~ 120 mesh, the resin showed the best water absorbency of 1860 g/g; The pH of the solution had a great influence on the water absorbent rate of resin, when the pH was 6 ~ 8, samples exerted the best performance on water absorbency; Besides, super absorbent polymer prepared in this report also had a good performance of water retention capacity. Fourier Transform Infrared Spectrometer (FTIR) and Scanning electron microscopy (SEM) showed that the nano-SiO2 successfully grafted to the polymer and spongy structure was formed.