The utility model relates to the technical field of water playing toys, in particular to a toy water polo which comprises a flexible shell, a flexible cover and an elastic arm, and a
water storage cavity and an opening communicated with the
water storage cavity and the external space of the flexible shell are defined in the flexible shell; the outer contour of the flexible cover body is larger than the contour of the opening so as to seal the
water storage cavity, and the elastic arm is connected with the side, facing the external space, of the flexible cover body and applies outward acting force to the flexible cover body. When the toy water ball is used, water can be filled into the water storage cavity or the water in the water storage cavity overflows from the opening only by enabling the toy water ball to deform under stress and exposing the water storage cavity through the opening. Compared with a magnetic attraction type toy water polo in the prior art, the toy water polo does not need to be internally provided with a magnetic piece, and safety and production cost are high. Compared with a non-magnetic toy water polo in the prior art, the toy water polo has the advantages that the flexible cover body can be tightly attached to the inner wall of the water storage cavity under the action of the elastic arm, so that the toy water polo has good sealing performance.