The construction of socialism new countryside is a significant strategic decision which Chinese government proposed at the new time. Reducing the Urban-rural gap, planning the city and countryside development, solving the question of 800,000,000 farmer's low overall income and low consumption level, not only is the most important problem in construction of the comprehensive well-off society, but also is a key link in advancement of constructing harmonious society, and it is the question which must be solved in the process of socialism new countryside construction. This article studies the new Characterization and new cause of the Urban-rural gap at new time, in order to find the new countermeasure of governing the Difference in price of agricultural and industrial product.