The invention discloses a novel portable hydrophobicity testing device.The novel portable hydrophobicity testing device comprises a base, a top insulation box, a supporting assembly, a video assembly, a spraying assembly and a receiving control system.The supporting assembly includes a hydraulic oil tank, a hydraulic oil booster pump, a hydraulic pipe and a supporting porcelain bottle.The hydraulic oil booster pump, the hydraulic oil tank and the hydraulic pipe are sequentially connected and arranged in the base.The video assembly and the spraying assembly are arranged in the top insulation box, the top insulation box is arranged above the supporting porcelain bottle, and the video assembly and the spraying assembly are connected with the receiving control system.The spraying assembly comprises a nozzle, a water pressure booster pump and a water tank which are sequentially connected.Water for testing is pressurized by the water pressure booster pump and then sprayed to an electric device to be tested through the nozzle.The video assembly comprises a minitype camera conducting shooting in multiple angles.By means of the novel portable hydrophobicity testing device, personal safety of testers can be guaranteed without power cutting during hydrophobicity testing, stable operation of an electrical system is guaranteed, and temporary power cutting is avoided.