The invention provides a hollow sucker rod thermal-washing valve suitable for a directional well. The hollow sucker rod thermal-washing valve comprises an upper connector, a short liquid joint and a lower connector. The two ends of the short liquid joint are connected with the upper connector and the lower connector respectively. A pressing cap is arranged in the upper end of the short liquid joint. The lower end of the pressing cap is connected with a ball seat body. The lower end of the ball seat body is connected with a valve ball. A valve ball centering device is arranged between the valve ball and the lower connector and sleeved with a spring. The pressing cap, the ball seat body, the valve ball, the valve ball centering device and the spring are located in the short liquid joint. According to the hollow sucker rod thermal-washing valve, through cooperation of the thermal-washing valve and a hollow sucker rod, the thermal-washing valve can be used for an inclined well as well as a straight well without being limited by inclination of wells; and a heat carrier is injected through the hollow sucker rod, a positive circulation system is built on an on-pump oil pipe and the hollow sucker rod through the thermal-washing valve, the heat carrier is injected into the well continuously or intermittently through an inner cavity of the hollow sucker rod to increase the temperature of a shaft, lower the viscosity of crude oil and eliminate wax precipitation of the shaft, and hot water, hot oil and steam can be used as the heat carrier.