Puncher capable of fast and accurate positioning

A puncher capable of fast and accurate positioning, comprising a cutter unit, a pressing plate, and a bottom seat in the sequence from top to bottom, wherein the cutter unit comprises a ejector rod for drilling, a top cover, a base, and a number of first springs, the top cover is installed on the base to be movable up and down, one end of the ejector rod is fixed on an inner side of the top cover, another end of the ejector rod is a punching end facing towards the base, and moreover, the base is provided with a guide hole for the ejector rod to pass through;

• the first springs are arranged between the top cover and the base, and the first springs act on the top cover;
• the pressing plate is arranged between the base and the bottom sea, and the pressing plate is provided with at least one first avoidance hole for the ejector rod to pass through;
• the bottom sea is configured to bear an object to be punched, and is provided with at least one second avoidance hole for the ejector rod to pass through, the at least one second avoidance hole and the at least one first avoidance hole are arranged in one-to-one correspondence;
• and
• the base is provided with a number of first magnetic attracting units, and the pressing plate is provided with a number of second magnetic attracting units, the bottom seat is provided with a number of third magnetic attracting units and a number of fourth magnetic attracting units, the third magnetic attracting units are magnetically attracted to the first magnetic attracting units to allow the base to be attracted on the bottom seat, and the fourth magnetic attracting units are magnetically attracted to the second magnetic attracting units to allow the pressing plate to be attracted on the bottom seat, for clamping the object to be punched between the pressing plate and the bottom seat.