Allyl phosphonic acid diethyl ester, prepared by Michaelis-Arbuzov reaction, reacted as the main reaction substrate with oxalyl chloride, 3-buten-1-ol and asymmetric chain terminated diene molecule containing phosphoru BEAPH was repared.The monomer can be transformed to the polymer having phosphoru in the main chain by non-cyclic diene metathesis polymerization, or be used for preparing heterocyclic alkene molecules containing phosphoru with closed loop metathesis polymerization. Successful preparing and purification of unsaturated monomers was confirmed using H NMR Spectrum. The condensation between molecules was proved by GPC curve and molecular weight, PDI datas,which have very important guiding significance to a conversion of allyl phosphorus-containing monomers and polymers preparation that contains phosphorus.