The invention provides a raindrop testing platform for testing a laser raindrop spectrometer. The raindrop testing platform comprises the raindrop spectrometer, a raindrop spectrometer fixing plate, a bracket, a first sleeve, a second sleeve, a shaft A and a shaft B, wherein symmetric and horizontal upper moving grooves are formed in two opposite ridges of an upper frame of the bracket; symmetric and vertical lower moving grooves are formed in a vertical frame which is connected with the two ridges; the first sleeve and the second sleeve are respectively connected with two opposite side edges of the raindrop spectrometer fixing plate; the shaft A penetrates through the second sleeve and is arranged inside the upper moving grooves; the shaft B penetrates through the first sleeve and is arranged inside the lower moving grooves; the raindrop spectrometer is fixed on the raindrop spectrometer fixing plate; the shaft A can horizontally move and is fixed inside the upper moving grooves; the shaft B can vertically move and is fixed inside the lower moving grooves. By adopting the raindrop testing platform, the adjustability of measuring angles and areas of testing areas of the laser raindrop spectrometer is achieved, the measurement precision and accuracy are improved, and the testing process is simple and convenient to operate.