The present invention relates to a mounting structure for components and parts of microwave oven. Said mounting structure includes: base plate B with mounting holes, mounting component which is backward prolonged to form several backward flanges and can be used for inserting into the mounting holes of base plate B, flange which is formed on one side of interior of the mounting holes and is prolonged toward the same direction of the base plate B and mounting projection hole formed on the backward flange. On anothe side of the flange there is a curved groove formed along the width direction, and in the front of free end portion of the curved groove a mounting projection portion is formed. Said inverted structure can firmly fix components and parts of microwave oven, and can raise reliability of said product. |