Roll shaft distance precise control device and multi-roll grinding machine

The utility model discloses a roller shaft distance precise control device and a multi-roller grinding machine. The roller shaft distance precise control device comprises a fixed detection module, a precise limiting module and a telescopic control module, wherein the precise limiting module and the telescopic control module are connected to the fixed detection module; the precise limiting module comprises a rotary limiting mechanism and a limiting regulation and control mechanism; the rotary limiting mechanism is arranged corresponding to the upper end of the fixed detection module, the telescopic control module is arranged on the other side of the rotary limiting mechanism relative to the fixed detection module, and the upper end of the fixed detection module penetrates through the rotary limiting mechanism and is connected with the telescopic control module; the limiting regulation and control mechanism is connected to one side of the fixed detection module and corresponds to the position of the rotary limi