The invention discloses a crosslinking type 
polymer anionic membrane and a preparation method of crosslinking type 
polymer anionic membrane. Anionic membrane takes a 
polymer containing chloromethyl group as a main chain; in preparation, the chloromethylation of polymer anionic membrane and 
ionization of the main chain are carried out successively, a 
biguanide or multi-guanide structural aquogel is prepared, and the aquogel performs thermal 
polymerization at original site in the membrane to form a membrane; at last, through the alkali treatment, the anion-exchange membrane is obtained. The 
guanidine type polymer contains a lot of 
guanidine radicals capable of conducting anion easily, and the 
ion conductivity can be effectively improved; the water-retaining ability of 
silane can also improve the ionic conduction ability of the membrane; the 
ion group is free from beta-H, so that Hofmann degradation can be eliminated; the 
super absorbent and inflation resistance of aquogel can improve 
water content of membrane, reduce OH- salvation degree, lighten 
attack of ON- to 
ion base, and improve the alkali stability of the membrane; the crosslinking structure can further inhibit the membrane swelling. The prepared membrane is high in water absorbent, low in swelling rate, and able to obviously improve the alkali stability of the membrane.