Key word: Social security system, question, consummation Paper abstract: First, the narration social security system construction function, and pointed out our country right now is in the social reforming time, the perfect social security system construction is a long-term project. Second, introduced our country social security system constructs the nearly 50 year basic situations, has experienced:The labor insurance, the social overall plan and a center, two guarantee, three safeguards lines three stages. And explained specifically each stage labor insurance system has an effect and the existence shades the end. Third, from five aspects explained our country social security system construction existence the main question, is concrete is: 1.The fund receives does not arrive at, falls into the financial crisis; 2.Individual account spatial account movement; 3.The socialized degree low, the state-owned enterprise burden is overweight; 4.Management method backward, the foundation work is weak; 5.The legal framework is not perfect. Fourth, the current social security must cause value several hot spots of society for example: 1.Population and employment; 2.Age oldering; 3.Peasant laborer; 4.Region difference; 5.Bears heavily; 6.Outside the wages receives. Fifth, acts according to our country social security system the basic situation and the existence main question, elaborated the consummation social security system way with emphasis from four aspects: First, correct assurance consummation social security system principle; Second, the consummation had social security system; Third, exploration social security system new domain; Fourth, perfect social security system fund safeguard mechanism.