Precise topdressing device containing topdressing pipe and based on corn planting

The invention provides a precise topdressing device containing a topdressing pipe and based on corn planting, and relates to the technical field of corn planting, the precise topdressing device comprises a base, the base is an arc-shaped structure, one side of the base is provided with bandages in a linear array, the front end of the base is fixedly connected with the topdressing pipe, the upper end of the topdressing pipe is connected with a topdressing box, and the topdressing box is fixedly connected with the topdressing pipe; the bottom end of the topdressing pipe is of a closed structure, a telescopic plate is installed on the left side of the bottom end face of the topdressing pipe through a spring and synchronously drives a topdressing head installed at the bottom end of a communicating pipe to rotate, and crushing teeth are fixedly connected to the peripheral face of the topdressing head in an annular array mode. And therefore, soil can be crushed synchronously when the position of the topdressing hea