Abstract: Reducing pension contribution rate is the basic requirement of supply side reform and important task of improving pension system, and reducing pension contribution is influenced by pension fund balance and fiscal subsidies capacity. This paper constructs the equation of the endowment insurance payment and payment actuarial model, the endowment insurance payment, the consumption expenditure and the economic growth, and empirically testing the direct and indirect effects of the adjustment of the social average wage statistical adjustment on the pension insurance. The study found that the adjustment of the social average wage statistical caliber will reduce the endowment insurance payment base of individual industrial and commercial and flexible employment personnel, the greater the income gap will be between urban and private enterprises, and the more decrease in the base of payment; the adjustment of statistical caliber has a direct effect on the reduction of endowment insurance the adjustment of statistical caliber reduces the net difference between the payment and payment of the insured, and reduces the income gap of the pension insurance in the unit; the adjustment of the statistical caliber has an indirect guarantee effect on the pension payment, the decrease in the base number of the endowment insurance, the reduction of the amount of the individual industrial and commercial households and the payment of the flexible employment pension insurance, and the increase of its disposable income and consumption expenditure to promote economic growth and improve the financial subsidy ability of old-age insurance.

Key words: the social average wage, statistical caliber adjustment, reducing pension contribution rate, direct driving effect, indirect protection effect