The invention relates to the field of construction technology, and discloses an automatic fixing and linear cutting wood trimming equipment for construction, which includes a housing, the surface of the housing is provided with a placement opening, and the rotating rod rotates to make the moving rod move intermittently left and right , to provide a power source for the subsequent fixing operation and cutting operation, increase the linkage between the structures, and make the operation more convenient. The connecting rod moves to the right to make the rotary rod rotate, causing the clamping rods to move closer to each other and then farther away, automatically fixing the wooden board. The stability of the wood board is guaranteed, avoiding the deviation of the wood board during subsequent cutting, which affects the cutting quality of the wood board, and after the cutting is completed, the fixation is automatically released to facilitate the next round of cutting operations. The moving rod pushes the moving board to move left and right, causing The knife wheel cuts the wood board in a one-way straight line, so that the cut of the wood board is kept horizontal, the cutting quality of the wood board is guaranteed, and the hands are freed to avoid long-term manual cutting, which will cause a burden on the arm.