The invention discloses a dimming circuit, a dimming method and an LED drive circuit. On the basis of the dimming of a dimming device, a plurality of current reference signals corresponding multiple loads are generated according to a dimming signal so as to change a proportion of each load current, so that the color temperature can be adjusted; and the dimming signal can be used for representing the exchange of a dimming device switch or the variation of a dimming speed and latching a proportion of each load current or latching a preset load current proportion. The color temperature can be adjusted directly by the dimming device without using an MCU, so that the compatibility is good, and the cost is decreased.