A joint trading mechanism for electricity energy and flexible ramping products （FRP） with the collaborative participation of energy storage systems （ESS） and demand-side resources （DSR） is proposed to address the system ramping pressure caused by the uncertainty of new energy output in power systems with a high proportion of new energy. An optimized dispatching model for the electricity energy-FRP market is constructed, considering the participation of energy storage and demand-side resources. A multi-segment pricing approach is adopted for FRP to incentivize adjustable resources in the system to participate in FRP services. Through demand response, energy storage and flexible demand-side resources collaborate to provide ramping capacity for the system, meeting the system's ramp requirements. Simulation results based on the IEEE 30-bus system demonstrate that ESS participation in FRP services significantly reduces FRU clearing frequency and prices during sharp net load increase periods, particularly under high renewable penetration scenarios. The high responsiveness of ESS substantially enhances system flexibility and stability. Furthermore, while ESS participation marginally increases electricity market prices, it synergistically improves regulatory capacity of the system.