Hybrid power transmission device and hybrid power automobile

The embodiment of the invention relates to a hybrid power transmission device which is used for connecting a generator, a first motor and a second motor to a power output shaft. The transmission device comprises a front planetary line and a back planetary line; a sun gear of the front planetary line is connected to the generator; a sun gear of the back planetary line is connected to the second motor; the front and back planetary lines share the same planetary carrier which is connected to the first motor; and a gear ring of the front planetary line is connected to the power output shaft. The invention also provides another embodiment, namely a hybrid power automobile. The hybrid power transmission device and the hybrid power automobile employ a double planetary line mechanism to realize stepless speed change; in addition, the torque input by the generator, the first motor and the second motor is coupled and transmitted to the output end and to wheels finally; and therefore, during actual use, different output modes can be generated through the combination of different work patterns and states of the three input ends.