Post-cast strip cleaning device and method

The invention provides a post-cast strip cleaning device and method.The post-cast strip cleaning device comprises a machine box and an impurity removing structure, a lifting plate is vertically and slidably connected to the top of an inner cavity of the machine box in a clamped mode, a separation cover is arranged in the middle of the top of the lifting plate, extending grooves are symmetrically formed in the bottom of the machine box, and a threaded rod is in threaded connection with the middle of the lifting plate; a first motor is arranged in the middle of the top of the separation cover, and the threaded rod is fixedly connected to the output end of the first motor. Through the arrangement of the impurity removal structure, a first grinding head at the bottom of the impurity removal structure is used for grinding a bottom concrete block of the post-cast strip, and an impeller at the bottom of the impurity removal structure is used for sucking away powder, so that the concrete block at the bottom of the po