Double-surface wall block and method for greening wall surfaces

The invention discloses a double-surface wall block and a method for greening wall surfaces. The double-surface wall block comprises an outer planting trough, an inner planting trough and insertion strips. The method for greening the wall surfaces of the double-surface wall block comprises the steps of outdoor greening and indoor greening. The wall block disclosed by the invention is the double-surface wall block and is attractive in appearance, practical, convenient to assemble, light in weight and low in cost; the utilization rate of the wall body space is maximum, so that the greening cost is reduced; the method for greening the wall surfaces is simple and convenient and is easy to operate.