A battery assembly assembling method, applied to a battery assembly clamp comprising a control unit, a pressing device, a clamping device a first feedback unit and a second feedback unit respectively electrically connected to the control unit, the method comprising: acquiring an actual pressing displacement amount of the pressing device moving downward; detecting the actual pressing displacement amount using the first feedback unit; characterized in that controlling the clamping device using the control unit to clamp the battery assembly from a first side face of the battery assembly if an absolute value of a difference between the actual pressing displacement amount and a preset standard pressing displacement amount is less than or equal to a preset pressing threshold; and controlling the pressing device using the control unit to move upward to be reset and press downward again if the absolute value of the difference between the actual pressing displacement amount and the preset standard pressing displacement amount is greater than the preset pressing threshold, acquiring a first actual displacement amount of the clamping device and a first clamping force of the clamping device performing clamping from the first side face of the battery assembly; detecting the first actual displacement amount and the first clamping force using the second feedback unit; and determining that assembling is completed using the control unit if an absolute value of a difference between the first actual displacement amount and a preset first standard displacement amount is less than or equal to a preset first displacement threshold, and an absolute value of a difference between the first clamping force and a preset first standard clamping force is less than or equal to a preset first clamping force threshold. acquiring an actual pressing displacement amount of the pressing device moving downward; detecting the actual pressing displacement amount using the first feedback unit; characterized in that controlling the clamping device using the control unit to clamp the battery assembly from a first side face of the battery assembly if an absolute value of a difference between the actual pressing displacement amount and a preset standard pressing displacement amount is less than or equal to a preset pressing threshold; and controlling the pressing device using the control unit to move upward to be reset and press downward again if the absolute value of the difference between the actual pressing displacement amount and the preset standard pressing displacement amount is greater than the preset pressing threshold, acquiring a first actual displacement amount of the clamping device and a first clamping force of the clamping device performing clamping from the first side face of the battery assembly; detecting the first actual displacement amount and the first clamping force using the second feedback unit; and determining that assembling is completed using the control unit if an absolute value of a difference between the first actual displacement amount and a preset first standard displacement amount is less than or equal to a preset first displacement threshold, and an absolute value of a difference between the first clamping force and a preset first standard clamping force is less than or equal to a preset first clamping force threshold.