The invention discloses a burner for a gas stove, which belongs to kitchen equipment and solves the problem that the traditional swirl burner emits a large amount of CO and NOx and is expected to be further improved in burning efficiency. In the burner, a nozzle is inserted into an induction tunnel fixedly connected with a base, the upper part of the base is a variable-diameter cylinder, a partition board is arranged at the position where the diameter makes a change, base space under the partition board forms a gas mixing chamber, the partition board is provided with N burner tubes which are uniformly distributed along a circumference, N is between 4 and 10, the burner tubes are hollow tubes of which the top ends are sealed and the lower end is communicated with the gas mixing chamber, and the lateral sides of the top ends of the burner tubes are provided with rectangular fire holes outward along the radius of the circumference. The burner has the advantages that: the rectangular fireholes are intensively arranged; heating is uniform; the distance from the fire holes to the bottom of a pan is reduced; the contact time of high-temperature fume and the bottom of the pan is prolonged; an energy gathering ring can be used to prevent air, collect heat and save energy; the radiated heat of the high-temperature fume is reduced; the burning efficiency is greatly improved; and the CO and NOx exhaust emission is reduced. Thus, the burner reaches national standards for energy conservation and environmental protection.