The utility model discloses a can use tunnel type microwave of metal conveyer belt to use cavity, it includes microwave cavity body (1), and the end chamber board of microwave cavity body (1) is metal conveyer belt (2), and (1) two side of microwave cavity body is provided with choke (3). The utility model has the advantages of reasonable design, the security is good, and no microwave leakage, metal conveyer belt do not have sparking phenomenon, can realize tunnel type microwave equipment's long -term stable transported material, the microwave high -usage, and cost of maintenance is low, can prolong tunnel type microwave equipment's life for tunnel microwave equipment can realize industrialization production, overcomes a great deal of not enough of among the prior art nonmetal conveyer belt microwave cavity.