In order to investigate the mechanical behavior of reinforced recycled concrete (pebble) beam subjected to high temperature and subsequent water cooling，the static load tests of 28 specimens under high temperature and water cooling were carried out with temperature，replacement ratio，cooling method and shear span ratio as analysis parametersThe apparent change and failure mode of the specimens were observed，and the loaddeflection curves and mechanical performance indexes were obtainedBased on the test data，the effects of various parameters on the mechanical behavior of specimens were analyzed，and the calculation method of the bearing capacity was discussedThe results show that the specimens are damaged under high temperature and subsequent water cooling，and the failure modes are bending failure and baroclinic failureThe mechanical behavior of the reinforced recycled concrete beam is better than that of normal reinforced concrete beam after high temperature and water coolingWith the increase of temperature，the bearing capacity increases first and then decreases，while the ductility and energy dissipation capacity gradually deteriorateWith the increase of replacement ratio，the bearing capacity，ductility and energy dissipation capacity have a slight increase less than 10%The cooling method expose a significant effect on the bearing capacity，but not on the ductility and energy dissipation capacityThe smaller the shear span ratio，the larger the bearing capacity，but the worse the ductility and energy dissipation capacityFinally，the revised European code is recommended to calculate the bearing capacity of the reinforced concrete beam after high temperature and water cooling.