Liquid supply mechanism and liquid cooling system

The invention discloses a liquid supply mechanism and a liquid cooling system. The liquid supply mechanism includes a shell, a cover, a piston and a driving unit. The shell has a liquid outlet. The cover is connected to the shell. A chamber is formed between the shell and the cover and is communicated with the liquid outlet. The piston is movably arranged in the chamber. The driving unit is arranged opposite to the piston. The driving unit is used for driving hte piston to move. The liquid supply mechanism can be optionally connected to a liquid cooling head, a heat disspator or a pipeline, when the pressure of liquid in the liquid cooling system is reduced due to reduction of the liquid, the liquid supply mechanism can drive the piston to move by means of the driving unit so as to inject the cooling liquid from the chamber into the liquid cooling system; namely, the liquid supply mechanism can supply the cooling liquid automatically when the cooling liquid is insufficient, thus avoiding damage of the liquid