The invention provides a salt field seawater evaporation desalting and rainy water recycling apparatus. The salt field seawater evaporation desalting and rainy water recycling apparatus consists of a fixed column, a pull rope, a positioning clamp, a suspension plate, a pull rod, a spring fixing plate, a return spring, a supporting rod, a supporting shaft, a rain collection evaporation cover, an external water collection trough plate, an internal water collection trough plate, a fixed clamping trough, a flow water pipe and a recycling water collection pipe. The salt field seawater evaporation desalting and rainy water recycling apparatus has the advantages that the rain collection evaporation cover is arranged above a salt field, the temperature in the salt field is increased and not influenced by the rainfall, the evaporation amount is increased, and fresh water and rainy water formed by condensing steam in the evaporation cover are collected by virtue of the recycling water collection pipe; the positioning clamp is arranged on a take-up and payoff rope, so that the flow water pipe can be accurately inserted into the recycling water collection pipe after the rain collection evaporation cover is laid down, and the quantity of the rain collection evaporation covers can be increased or reduced according to the size of the salt field.