An electric drive assembly with oil/water dual cooling, the electric drive assembly comprises a motor module, a gearbox module, a water cooling module and an oil cooling module; the motor module comprises a motor housing, a motor shaft and a stator; the gearbox module comprises a gearbox housing and a first rotating shaft of gearbox, and the gearbox housing is disposed at a rear end of the motor housing; the oil cooling module comprises an oil conveying device, an oil conveying passage and an oil return passage, the oil conveying device is disposed at a bottom of the gearbox housing, the oil conveying passage is communicated with an inner cavity of the motor housing and an inner cavity of the gearbox housing, and the oil return passage is disposed at a bottom of the motor housing, characterized in that: the water cooling module comprises a motor water jacket and a heat sink, the motor water jacket is sleeved on the motor housing, an upper part of the motor water jacket is provided with a first water inlet, a lower part of a rear end of the motor water jacket is provided with a first water outlet, the heat sink is disposed at a lower end of the gearbox housing, and a front end and a rear end of the heat sink are respectively provided with a second water inlet and a second water outlet; the oil conveying passage comprises a first oil conveying passage, and the first oil conveying passage comprises a first oil inlet, a first oil passage, a motor front end oil passage and a motor front end shaft inner hole; the first oil inlet is disposed on a front end face of the gearbox housing above the motor housing, the first oil passage is disposed above the motor housing and is communicated with the motor front end oil passage and the motor front end shaft inner hole, and a bottom of the motor front end shaft inner hole is provided with a first oil outlet hole, there are at least two first oil outlet holes, which are disposed at a front side and a rear side of a front end bearing of the motor shaft respectively, and the first oil outlet hole at the rear side corresponds to a front end winding of the motor stator. the electric drive assembly comprises a motor module, a gearbox module, a water cooling module and an oil cooling module; the motor module comprises a motor housing, a motor shaft and a stator; the gearbox module comprises a gearbox housing and a first rotating shaft of gearbox, and the gearbox housing is disposed at a rear end of the motor housing; the oil cooling module comprises an oil conveying device, an oil conveying passage and an oil return passage, the oil conveying device is disposed at a bottom of the gearbox housing, the oil conveying passage is communicated with an inner cavity of the motor housing and an inner cavity of the gearbox housing, and the oil return passage is disposed at a bottom of the motor housing, characterized in that: the water cooling module comprises a motor water jacket and a heat sink, the motor water jacket is sleeved on the motor housing, an upper part of the motor water jacket is provided with a first water inlet, a lower part of a rear end of the motor water jacket is provided with a first water outlet, the heat sink is disposed at a lower end of the gearbox housing, and a front end and a rear end of the heat sink are respectively provided with a second water inlet and a second water outlet; the oil conveying passage comprises a first oil conveying passage, and the first oil conveying passage comprises a first oil inlet, a first oil passage, a motor front end oil passage and a motor front end shaft inner hole; the first oil inlet is disposed on a front end face of the gearbox housing above the motor housing, the first oil passage is disposed above the motor housing and is communicated with the motor front end oil passage and the motor front end shaft inner hole, and a bottom of the motor front end shaft inner hole is provided with a first oil outlet hole, there are at least two first oil outlet holes, which are disposed at a front side and a rear side of a front end bearing of the motor shaft respectively, and the first oil outlet hole at the rear side corresponds to a front end winding of the motor stator. the water cooling module comprises a motor water jacket and a heat sink, the motor water jacket is sleeved on the motor housing, an upper part of the motor water jacket is provided with a first water inlet, a lower part of a rear end of the motor water jacket is provided with a first water outlet, the heat sink is disposed at a lower end of the gearbox housing, and a front end and a rear end of the heat sink are respectively provided with a second water inlet and a second water outlet; the oil conveying passage comprises a first oil conveying passage, and the first oil conveying passage comprises a first oil inlet, a first oil passage, a motor front end oil passage and a motor front end shaft inner hole; the first oil inlet is disposed on a front end face of the gearbox housing above the motor housing, the first oil passage is disposed above the motor housing and is communicated with the motor front end oil passage and the motor front end shaft inner hole, and a bottom of the motor front end shaft inner hole is provided with a first oil outlet hole, there are at least two first oil outlet holes, which are disposed at a front side and a rear side of a front end bearing of the motor shaft respectively, and the first oil outlet hole at the rear side corresponds to a front end winding of the motor stator.