The invention relates to a portable notebook computer placing box which comprises a box body. The box body comprises a shell, a cover body, a bearing plate and a driving mechanism, the shell is a ''U''-shaped frame composed of a front side plate, a rear side plate and a bottom plate, the cover body comprises a left cover body and a right cover body which are the same in structure and size, and the right cover body and the left cover body are in bilateral symmetry; and the left end of the connecting column on the right cover body makes contact with the right end of the connecting column on the left cover body, the bearing plate is located in the shell, and the driving mechanism comprises a driving rod, a driving shaft and a motor. When the left cover body and the right cover body are closed, vibration operation of the notebook computer when the box body falls can be avoided, the driving rod can support the bearing plate upwards when driving the left cover body and the right cover body to be separated so that the notebook computer extends out of the box body upwards, and the use habit of people for the notebook computer is met; and the placing box has three forms of a storage state, an open state and a protection state, is suitable for being carried outside, and is simple in structure and convenient to use.