The invention provides a multifunctional office desk. The multifunctional office desk comprises a keyboard drawer and a ventilation fan; an office platform is fixed to the tops of supporting rods through a thread; a lamp roll support is arranged at the top of the office platform and is located at the left side of a clapboard at the left side; a main case is inversely fixedly hung at the bottom ofthe office platform; the keyboard drawer is slidably arranged at the bottom of the office platform; the ventilation fan is fixedly connected between the two supporting rods at the two sides. The multifunctional office desk is provided with the office platform, two plugging slots are symmetrically formed in the top of the office platform, the clapboards are slidably arranged inside the office platform and are fixedly screwed on through pushing screws, the clapboard can freely slide inside the plugging slots simply by loosening the pushing screws, when a private space is needed, the clapboards can be slidably drawn out, the office platform is separated from an adjacent office platform, when work is needed and exchange needs to be conducted with a colleague, the pushing screws can be loosenedto downwards slide the clapboards to interact with the colleagues, and by slidably drawing the clapboards, the office platform is more flexible to use.