The invention relates to the field of equipment in the livestock breeding industry, in particular to a water bowl for piglets. The water bowl comprises a water pipe, a base body, a casing, a torsional spring, a water receiving bowl, a stainless steel tongue piece, a water drinking nozzle and a water volume adjustment cock; wherein the casing is connected with the water receiving bowl through the torsional spring; a water tank which reaches a water storage tank at the bottom and is perpendicular to the water receiving bowl is formed in the base body; a water volume adjustment cock hole is formed in the base body, a screw port is formed in the top end of the water volume adjustment cock, and the pointed end of the water volume adjustment cock penetrates through the water tank and is inserted into the base body; the water drinking nozzle comprises a contact head, a water retainer, a spring and a limiting block. A hidden contact type water outlet system is adopted, water flows to the bottom of the water receiving bowl without splashing after flowing out, so that the piglets can drink water conveniently and can keep the physiological habit of drinking water with heads lowered, stress can be effectively reduced, the bottom of the water receiving bowl adopts a movable structure connected with the casing through the torsional spring, the water receiving bowl can be cleaned conveniently by being pressed down, no hygienic blind angles are left, and the problems of bacterium breeding and infectious disease spreading caused by accumulation of water can be solved.