The invention discloses an ultrasonic cleaning tank and washing equipment provided with the same. The ultrasonic cleaning tank comprises a washing tank, an ultrasonic vibration source and a water through opening, wherein the ultrasonic vibration source is mounted at the bottom of the washing tank, and the water through opening is formed in the bottom of the washing tank. The water through openingcommunicates with a siphon drainage pipe arranged outside the washing tank. The siphon drainage pipe comprises a water inlet end, a siphon formation position and a water outlet end, wherein the waterinlet end is arranged below the water through opening and connected with the water through opening; the siphon formation position is arranged at the highest position of the siphon drainage pipe; and the water outlet end is connected with a main drainage pipe. The interior of the portion, between the water outlet end and the water through opening, of a pipeline is completely through, and a make-and-break state control valve does not need to be arranged between the water outlet end and the water through opening. The horizontal height where the drainage water level of the washing tank is locatedis that where the siphon formation position is located. The washing equipment comprises a table top plate. A mounting portion is arranged on the table top plate. The ultrasonic cleaning tank is arranged inside the mounting portion. The ultrasonic cleaning tank and the washing equipment are simple in structure and low in cost; reliability of the ultrasonic cleaning tank and the washing equipment isgreatly higher than that of the prior art; and in addition, production, mounting and after-sales repair of the ultrasonic cleaning tank and the washing equipment can be conducted conveniently.