The invention discloses a motor locked-rotor current detection circuit, which comprises a single chip microcomputer and a motor M, wherein a locked-rotor current detection circuit is arranged between the single chip microcomputer and the motor; the single chip microcomputer controls positive and reverse rotation of the motor through the locked-rotor current detection circuit; the motor M comprises a positive electrode of the motor and a negative electrode of the motor; the single chip microcomputer comprises I/O ports A, B and C; and the locked-rotor current detection circuit comprises current-limiting resistors R1 and R2, triodes Q1 and Q2, current-limiting diodes D1 and D2, relays K1 and K2 and sampling resistors R3 and R4. Through the designed scheme, the motor locked-rotor can be accurately detected and a power supply of the motor is timely powered off, so that the condition that the motor is damaged due to over-high locked-rotor current of the motor is avoided. By the motor locked-rotor current detection circuit, the detection accuracy rate is high, the cost is low, the structure is simple and the service lifetime of the motor is effectively prolonged.