A burner cap for a burner of a gas cooktop, comprising: an inner ring cap portion, wherein the bottom of the inner ring cap portion comprises an inwardly concaved first concaved portion, the first concaved portion is configured to accommodate gas supplied by an inner ring gas injector, and the inner ring cap portion is provided with a first gas outlet in communication with the first concaved portion; and an outer ring cap portion, wherein the outer ring cap portion surrounds the periphery of the inner ring cap portion, the bottom of the outer ring cap portion is inwardly concaved to form an outer ring concaved portion, the outer ring concaved portion is configured to accommodate gas supplied by an outer ring gas injector, and the outer ring cap portion is provided with outer ring gas outlets (201, 202) in communication with the outer ring concaved portion, wherein in a use state of the burner cap, the first concaved portion is separated from the outer ring concaved portion, wherein the inner ring cap portion is further provided with a second gas outlet, and in the use state of the burner cap, the second gas outlet is in communication with the outer ring concaved portion, characterized in that the bottom of the inner ring cap portion further comprises an inwardly concaved second concaved portion, and the second concaved portion is disposed at the periphery of the first concaved portion; and in the use state of the burner cap, the second concaved portion is separated from the first concaved portion, the second concaved portion is in communication with the outer ring concaved portion, and the second gas outlet is in communication with the second concaved portion. an inner ring cap portion, wherein the bottom of the inner ring cap portion comprises an inwardly concaved first concaved portion, the first concaved portion is configured to accommodate gas supplied by an inner ring gas injector, and the inner ring cap portion is provided with a first gas outlet in communication with the first concaved portion; and an outer ring cap portion, wherein the outer ring cap portion surrounds the periphery of the inner ring cap portion, the bottom of the outer ring cap portion is inwardly concaved to form an outer ring concaved portion, the outer ring concaved portion is configured to accommodate gas supplied by an outer ring gas injector, and the outer ring cap portion is provided with outer ring gas outlets (201, 202) in communication with the outer ring concaved portion, wherein in a use state of the burner cap, the first concaved portion is separated from the outer ring concaved portion, wherein the inner ring cap portion is further provided with a second gas outlet, and in the use state of the burner cap, the second gas outlet is in communication with the outer ring concaved portion, characterized in that the bottom of the inner ring cap portion further comprises an inwardly concaved second concaved portion, and the second concaved portion is disposed at the periphery of the first concaved portion; and in the use state of the burner cap, the second concaved portion is separated from the first concaved portion, the second concaved portion is in communication with the outer ring concaved portion, and the second gas outlet is in communication with the second concaved portion.