The invention discloses a control method of a double-air-duct internal and external circulation mother and baby disinfection cabinet. The disinfection cabinet comprises a cavity, an external circulation air duct and an internal circulation air duct, wherein the external circulation air duct and the internal circulation air duct are communicated with the cavity; a plurality of temperatures W1, W2, W3,..., Wn are set, the temperatures W1, W2, W3,..., Wn are all fixed threshold values, and W1lt; w < 2lt >; w1, W2, W3,..., lt; wn; the control method comprises the following steps: S1, increasing the temperature in the cavity to enable the temperature in the cavity to be not lower than W1; s2, enabling the temperature in the cavity to be uniform by utilizing an internal circulation air duct; s3, circularly executing the steps S1 to S2, increasing the temperature in the cavity to the set temperatures W2, W3... Wn, and enabling the temperature in the cavity to be uniform; s4, when the temperature reaches the set temperature Wn, the internal circulation air duct is utilized, the working time length t0 is set, and
drying is completed after t0; the
internal temperature of the cavity is controlled through the internal and external circulating air ducts, so that rapid
drying and dehumidification are carried out, and the disinfection efficiency and effect are improved.