Water mixing device capable of adjusting water temperature by automatic oscillation

The utility model relates to a water mixing device capable of adjusting water temperature by automatic oscillation, which comprises a valve body. A left end cap and a right end cap are arranged on the left and the right of the valve body respectively, a pressurizing cavity, a cold water cavity, a mixing cavity and a hot water cavity are sequentially arranged in the valve body from left to right, and a drainage port, a cold water throttling port, a mixing port and a hot water throttling port which are communicated with the pressurizing cavity, the cold water cavity, the mixing cavity and the hot water cavity respectively are arranged outside the valve body. A cold water spool is arranged in the cold water cavity, a hot water spool is arranged in the hot water cavity, the cold water spool is connected with the hot water spool, and the right end of the hot water spool is connected with an offsetting spring. A guide portion further arranged in the valve body comprises a guide check valve, a water inlet passage an