The invention provides a composite nano power generator of a contact separation type, and the power generator comprises a friction power generation assembly and an electromagnetic induction power generation assembly. A first power generation part of the friction power generation assembly comprises a first friction part and a first electrode which is arranged to contact with the first friction part. A second power generation part comprises a second friction part and a second electrode which is arranged to contact with the second friction part. A magnet part of the electromagnetic induction power generation assembly is disposed on the first power generation part, and a coil part is disposed on the second power generation part. Under the action of an external force, the surfaces of the first and second friction parts contact with each other and are separated with each other. The contact surface materials of the first and second friction parts have difference in capability of obtaining or losing electrons. Meanwhile, the magnetic flux of the magnet part changes in the coil part. The motor is simple in structure, and is low in cost. One time mechanical movement of contact and separation between the first power generation part and the second power generation part can generate two types of electric signals for output at the same time, thereby improving the energy conversion efficiency.