The utility model relates to the field of living furniture. The utility model relates to a computer desk, in particular to a mechanical computer desk with a height adjusting function. The desk comprises first desk legs and a desktop, the inner sides of the first table legs are connected with first sliding rods in a sliding manner; a sleeve rod is fixedly connected to the top end of the right end surface of the first table leg; the right end surface of the sleeve rod is fixedly connected with a second table leg; a handle is rotatably connected to the center of the right end face of the sleeve rod and penetrates through the sleeve rod, a threaded shaft is fixedly connected to the left end face of the handle, a sliding block is spirally connected to the outer side of the threaded shaft and slidably connected with the sleeve rod, a first rotating shaft is fixedly connected to the top end face of the sliding block, and a support is rotatably connected to the outer side of the first rotatingshaft. According to the height-adjustable desk, the threaded shaft, the sliding block and the support are arranged, the threaded shaft is rotated to enable the sliding block to move to drive the support to move, the desktop is moved downwards, the height of the desk is adjusted, and the height-adjustable desk is novel in design concept, scientific in design, huge in economic benefit, wide in market prospect and worthy of application and popularization.