According to requirements of CPC Henan Provincial Committee，Yanshi City stresses local practical characteristics，and takes serious measures to construction of four basic institutions for grass roots. It presents remarkable characteristics of organic unification for overall coordination and classified implementation，platform specification and carrier innovation and demonstrating and driving and basic guarantee. It achieves excellent effects of promoting scientific and democratic decision-making，boosting social harmony and stability，associating party and the masses closely and purifying political ecology environment of grass roots. It provides practical samples to solidify grass roots foundation. Practice of Yanshi has proved that four basic institutions of grass roots are a systematic organic whole. Among them，democratic and scientific decision-making institution is the core，contradiction mediation and resolution institution is the key，convenience service institution is the foundation and supervision and inspection institution for party conduct and style of the government is the guarantee. They constitute together new system for institutions of grass-roots party construction.