The utility model discloses a side slope dry -wet cycle analogue test device, it includes: the support frame, the side slope loading board, it sets up on the support frame, the platform rotates, its through a pivot in order can the pivoted mode setting up on the support frame, and rotate the platform and rotate by slewing mechanism drive, fluorescent tube, a plurality of fluorescent tube set up in the up end that rotates the platform under with on in the terminal surface one, and the rain drops generator, it includes: the water receiver, it sets up in the up end that rotates the platform under with on in the terminal surface another, one end of the support rack is hinged at the support. The water injection pipe, its inner chamber with the water receiver is linked together, and the water pump, its and notes water piping connection. The utility model discloses the alternation of weather can simulate in a flexible way to receive the experiment that the weather changes to be influenced in carrying out the side slope, thereby instruct the protection of side slope.