The utility model relates to a long-
distance running circle counting device, and belongs to the field of track and field sports. The keyboard comprises a box body,
mushroom head buttons, a display screen, a U-shaped
handle, a power switch, a
single chip microcomputer and a matrix keyboard circuit, the buttons are arranged on a panel of the box body, the display screen is installed on the panel of the box body, the two ends of the U-shaped
handle are hinged to the two side walls of the box body respectively, the power switch is arranged on the side walls of the box body, and the
single chip microcomputer is connected with the matrix keyboard circuit. The single-
chip microcomputer is fixedly installed in the box body, the matrix keyboard circuit is arranged in the box body, a battery
jar is installed on the side wall of the box body, the battery
jar is electrically connected with the power switch, the power switch is electrically connected with the single-
chip microcomputer, and the single-
chip microcomputer is electrically connected with the display screen and the matrix keyboard circuit. The
mushroom head button is connected with the matrix keyboard circuit through pressing. The circle counting device is used by a referee to count the number of circles completed by an athlete, the circle counting
workload of the referee is reduced, and therefore the probability that the referee counts the circles by mistake is reduced.