A washing method with polymer solid particles comprises: step 1: washing clothes with the polymer solid particles, the surface of said polymer solid particles is provided with absorption holes; step 2: dehydrating the polymer solid particles and the clothes together; step 3: separating the polymer solid particles from the clothes and collecting the polymer solid particles; step 4: rinsing the clothes; and step 5: dehydrating the clothes. Before separating the polymer solid particles from the clothes, there is a step of dehydrating the polymer solid particles and the clothes together, so the user can easily separate the polymer solid particles from the clothes.