This study takes advantage of alginate gel, sodium lauryl sulfate solution is mixed with recycled paper fibers, even after adequate stirring microwave solid foam, the preparation of a sample of soilless cultivation in different proportions. Discussion same concentration of alginate colloid weight, same microwave foaming time, and sodium lauryl sulfate aqueous solution at the same concentration but different weight and different gram pulp weight, foamed sample moldability and physical properties affected. This study will explore the use of recycled paper fiber as the main cultivation medium, and add the sodium alginate aqueous colloid and sodium dodecyl sulfate, calcium chloride mixed aqueous foam bubbles after cross linking.