The utility model discloses a four-turbine hydraulic torque converter which is characterized in that the hydraulic torque converter is provided with four turbines, and the first turbine is connected with the output shaft of the hydraulic torque converter through a first reducing gear and a first one-way clutch and transmits torque at a low rotation speed ratio; the second turbine is connected with the output shaft of the hydraulic torque converter through a second reducing gear and a second one-way clutch and transmits torque at a relatively high rotation speed ratio; the third turbine is connected with the output shaft of the hydraulic torque converter through a third accelerating gear and a third one-way clutch and transmits torque at a relatively high rotation speed ratio; the fourth turbine is connected with the output shaft of the hydraulic torque converter through a fourth accelerating gear and a spline and transmits torque at a high rotation speed ratio. The four-turbine hydraulic torque converter has the advantages that large torque conversion range and wide efficiency range can be provided, gear shifting can be avoided or reduced under working conditions that the hydraulic torque converter is large and frequent in load change, and the four-turbine hydraulic torque converter is applicable to fields such as car making and scientific researches.