The invention relates to a double-use motorcar rain brush for shaving rain and snow, which comprises a flexibility crook spring piece, a plurality of clamping seats, a shaving strip supporting seat, a coating cover, a shaving strip, two sealing covers and a supporting connection seat, wherein, the flexibility crook spring piece, a plurality of clamping seats and the shaving strip supporting seat can be respectively and totally coated by the coating cover and the two sealing covers to prevent snow grains and rain incursion, and the shaving of snow or rain on a wind shield can be ensured in raining or snowing days, and the rain brush can prevent the difficulty and the inconvenience that the rain brush must be changed into a snow brush in winter and the snow brush must be changed into the rain brush again in other seasons. The rain brush not only can eliminate the supporting type snow brush but also can prevent the cost via the exchange of the rain brush and the snow brush, and has double benefits of economy and environment protection.