The invention discloses a frequency converter energy consumption braking control circuit, a frequency converter and a frequency converter energy consumption braking control method. The control circuitis connected with a main circuit of the frequency converter, wherein the main circuit comprises a braking resistor R1. The control circuit comprises a detection module and an energy consumption braking module, wherein the detection module is used for detecting the voltage of a busbar in the energy consumption braking process of the frequency converter and determining an interval in which the voltage of the busbar is located; and the energy consumption braking module is used for connecting the braking resistor R1 to the busbar to perform energy consumption braking when the detection module detects that the voltage of the busbar exceeds a pumping voltage upper limit value UH, and is used for disconnecting the braking resistor R1 from the busbar when the detection module detects that the voltage of the busbar is lower than a pumping voltage lower limit value UL. The braking resistor R1 is connected to perform energy consumption braking when a motor stays at a braking state, so that the braking resistor R1 is avoided from being continuously electrified to operate, and the working efficiency and reliability of a variable-frequency motor driving system are improved.