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 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 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 . <EOS>