Waterproof protection circuit and underwater cleaning equipment

The embodiment of the utility model discloses a waterproof protection circuit and underwater cleaning equipment, the waterproof protection circuit is arranged on a battery protection board, the battery protection board is connected with a battery and a load in parallel, and the waterproof protection circuit comprises at least one detection unit, a switch unit and a controllable fusing unit. According to the embodiment of the invention, the waterproof protection circuit can be used for detecting whether water enters the battery protection board, and when the detection unit detects that water enters the battery protection board, the loop formed among the detection unit, the switch unit and the battery is switched on, so that the current in the controllable fusing unit is increased, the battery is fused due to overheating, and the loop between the battery and the load is cut off; therefore, the electric connection between the battery and the load is correspondingly cut off, the load is actively prohibited from c