The invention discloses a bias voltage supply circuit, a memory controller and a memory circuit. The bias voltage supply circuit is located in the memory section controller, and the memory section controller is used for access of one memory section in the memory circuit. The bias voltage supply circuit includes the following parts: a first switch for maintaining the conduction state; a first current path (weak path) comprising a second switch, which turns into a breakover state according to a first DC bias voltage; and a second current path (strong path) comprising a third switch, which turns into a breakover state according to a first DC bias voltage, and a fourth switch, which is turns into a breakover state based on the control of a memory section selection signal. The level of the word line bias voltage changes according to the level of operating voltage and conduction state of the second current path.